How to check the status of your PC. PC prevention: checking, cleaning and treatment

). In this case, some begin to worry and look for all sorts of reasons and ways to eliminate freezes.
I will not repeat myself and write why this happens, because... The article is not about this and I have already given a link to solving problems above.
I’d rather show you one interesting way that will help you check your system for errors.

Few people know, but in Windows OS there is one useful “little thing” that can search And correct errors in the system itself. Moreover, it will not touch third-party programs, but will only check its system files. This is useful and interesting because many do not think that the reason may be hidden in the system itself, but feverishly begin, and so on. All in all . Yes, this is useful and can lead to good results, but with all these actions it is good to remember what I will write about below.

I already wrote a little about this function in the article, which can also arise due to a failure in system files, which are often forgotten. But still, within the framework of this article, I will repeat...

So, let's run:

and enter it into sfc /scannow:

The system check will begin:

All you have to do is wait.

For those interested, here is a description of the command and keys.

sfc
Where:
/scannow – immediately scans all protected system files.
/scanonce – scans all protected system files once at the next system boot.
/scanboot – scans all protected system files at every boot
/REVERT – Sets the initial parameters to default.
/ENABLE – Enable normal operation of Windows file protection
/PURGECACHE – Clear file cache and check files immediately
/CACHESIZE=x – Sets the file cache size

In the command line (Start -> Run -> cmd) we write the command sfc / and the desired key.

After the check is completed, the system will report the results and ask you to reboot.

That's all I have. Thank you all for your attention.

The development of virus software occurs at such a pace that not all antiviruses can cope with it. Therefore, when a user begins to suspect that malware has appeared on his computer, but the installed anti-virus program does not find anything, portable scanners come to the rescue. They do not require installation, so they do not conflict with the installed protection.

There are many scanners that can easily determine if there is a threat on your system, and some will even clean it of unnecessary files. You just need to download the utility you like, configure or download the databases if necessary, run it and wait for the result. If problems are found, the scanner will offer you a solution.

Users also use anti-virus utilities when there is no protection on their computer, because it is easier to use a scanner than to forever load the processor with an anti-virus program, especially on weak devices. Also, portable utilities are convenient, because if you have problems with the installed protection, you can always run a scan and get the result.

Method 1: Dr.Web CureIt

Dr.Web CureIt is a free utility from the famous Russian company Dr.Web. This tool is capable of treating detected threats or quarantining them.

Method 2: Kaspersky Virus Removal Tool

Kaspersky Virus Removal Tool is a useful and accessible tool for everyone. Of course, it does not provide such protection as Kaspersky Anti-Virus, but it copes well with all kinds of malware that it finds.

Method 3: AdwCleaner

AdwCleaner is a lightweight utility that can clean your computer of unwanted plugins, extensions, viruses and more. Can fully check all sections. Free and does not require installation.

Method 4: AVZ

AVZ's portable mode can be a very useful tool for removing viruses. In addition to cleaning from malicious programs, AVZ has several useful functions for convenient work with the system.

Knowing several useful portable scanners, you can always check your computer for virus activity and eliminate it. In addition, some utilities have other useful functions that can always come in handy.

Not all users install an antivirus on their computer or laptop. Some people are lazy, others don’t see the need for it. And when suddenly your PC starts behaving strangely (it’s buggy and slow, or advertising appears in the browser), you can simply check your computer for viruses online and for free. Fortunately, there are plenty of options today.

Below are the 7 best antiviruses that can scan for viruses online. True, you won’t be able to check your computer without downloading the installer. Virus scanning is done online, but antiviruses need access to your files. Therefore, some of them are installed as a browser module, and some are installed as a small utility.

Kaspersky Security Scan – a powerful online virus scanner

A full-fledged antivirus is well known in Russia, and its “younger brother” is also popular.

The program runs in the cloud, so you can quickly check Kaspersky for viruses online on any PC or laptop.

Its main advantages:

• does not slow down Windows (which cannot be said about the full-fledged Kaspersky antivirus, which “eats” a lot of resources during scanning);
• does not conflict with other antiviruses installed on the computer;
• does not remove detected viruses, but only reports them (on the one hand, this is a plus, but on the other, you will have to remove them manually);
• issues a detailed report.

1. Download the installer file from this link http://www.kaspersky.ru/free-virus-scan.
2. Launch the program.
3. Wait until the scan is completed.

After this, all you have to do is remove the viruses (if any were found).

BitDefender QuickScan - fast online PC virus scan

Another way to clean your computer from viruses online is by using BitDefender QuickScan. It is considered very effective and enjoys great success abroad. About the same as our Kaspersky.

Cleaning your computer from viruses online is also easy. All you need is:

1. Follow this link http://quickscan.bitdefender.com/.
2. Click on “Scan Now”.
3. Install a browser module through which the antivirus will gain access to your folders and files.
4. Wait until the check is completed.

The main advantage of BitDefender is fast online virus scanning. On average it takes 1-2 minutes. On the one hand, this is cool, but on the other, what will he be able to scan in such a short time?

Most likely, the online scanner checks the main list of the most common threats: system files, startup - i.e. those places where viruses mainly “live”. The developers themselves say that checking your computer for viruses online is carried out in the cloud (on their servers), which is why it is done so quickly.

ESET Online Scanner - effectively scan your computer for viruses

The next method is using a free ESET product from the developers of NOD32. To start checking, follow this link.

It is recommended to scan your PC through Internet Explorer - in this case, the scan will be performed in the browser window. When using Chrome, Firefox or Opera, the user will have to download a small file, and the PC analysis will be performed in a separate program.

After downloading and running the file, you need to set the settings. For example, enable scanning of archives and potentially dangerous programs. You can also clear the checkbox in the “Remove threats” item so that the antivirus does not accidentally erase important files that, in its opinion, are infected. Then click the "Start" button.

ESET Online Scanner will update the database, after which an online scan of your PC for viruses will begin.

• a thorough system scan (takes 40 minutes on average - depends on your Internet speed and HDD capacity);
• detects any threats;
• can detect malware, incl. in the register;
• performs heuristic analysis;
• generates a complete report on the work performed.

Another plus is that the online scanner is automatically deleted after the scan is completed. That is, no files will remain after it.

Thus, ESET antivirus is perhaps one of the best ways to clean your computer from viruses online. Its only drawback is the need for installation.

Panda Cloud Cleaner - online scanning of flash drives for viruses

Users are offered 4 versions to choose from:

• standard;
• portable (does not require installation);
• for scanning USB flash drive;
• in ISO format (emergency boot disk for checking PC viruses that won’t turn on).

Which version to choose, decide for yourself. For example, if you want to check a flash drive for viruses online, then download the third installer on the developers’ website.

Main advantages:

• quick check (on average 20-30 minutes);
• detection of common threats;
• effective online virus cleaning.

As in the previous case, Panda also “self-destructs” after successfully checking and treating viruses. That is, it is automatically deleted and does not leave any files behind.

F-Secure Online Scanner – treatment of viruses and spyware

Another excellent antivirus that can scan your computer for viruses online. To start checking, go to the developers’ website and click on the “Launch” button. After downloading and launching the installer, a new window will open in which scanning of the laptop or PC will begin.

The main advantages of this antivirus:

• quick scanning – takes 10-15 minutes on average;
• effective treatment of viruses and spyware utilities;
• works even with antivirus installed on your PC.

Before starting the scan, it is advisable to turn off “heavy” programs. This will help speed up the scanning process.

VirusTotal

All previous options had one common disadvantage - the need to download the installer. In this case, you can scan your computer for viruses online without installing any programs.

VirusTotal is a service from Google that can scan any files on your PC. It can also scan sites for malicious utilities. Using the service is very simple:

1. Follow this link.
2. Provide the path to the file you want to scan or the URL of any website.
3. Click the "Check" button.

Wait until the check is completed, and then look at the report.

It is not possible to scan all documents on your computer using VirusTotal. It can scan sites and files individually. This option is suitable for those who, for example, have downloaded a program and want to make sure that it does not contain viruses before installing it. For such cases, VirusTotal is best suited, because it does not need to be downloaded.

Dr.Web - effective scanning of files for viruses

And the last way is through Doctor Web. It has an excellent service that allows you to check individual files. For this:

1. Go to this website http://online.drweb.com/.
2. Click Browse and browse to the file you want to scan.
3. Click the “Check!” button.

In this case, you can scan your computer for viruses online without installing Dr. antivirus. Web. But, like VirusTotal, Doctor Web can scan only one file at a time.

A few words in conclusion

This sounds strange, but it is impossible to completely scan a laptop or computer and remove viruses online. The first 5 antiviruses require the installation of a small file. The question arises: isn’t it easier to install a full-fledged version of Kaspersky or BitDefender? They have more features, plus they provide real-time PC protection. In addition, many popular antiviruses have free versions.

The last 2 options are VirusTotal and Dr. Web – do not require installation, but check one file at a time. This is also not entirely convenient.

By the way, a computer or laptop may be infected not with viruses, but with malware. As a result, advertisements appear in the browser, third-party pages of unknown sites open, etc. In this case, antiviruses will not help; special software is required.

Check POST signals. POST stands for post-power-on self-test. Typically, POST messages appear immediately after the computer is turned on, even before the operating system boots. POST displays any errors related to the computer's hardware, whether they affect the loading of the operating system or not.

Pay attention to the loading time of the operating system. Long boot times indicate errors on the hard drive.

After the system boots, pay attention to the graphics. If the display quality deteriorates, there are problems with the video card driver or the video card itself.

Do a sound test. Sound problems are not the most critical errors, but this test shows how correctly the computer is configured. Launch any audio file. If the sound “floats” or disappears, this indicates a busy processor and a lack of RAM. The best test is to change the operating system boot sound. Another reason for audio interruption could be PIO (software input/output). It affects the speed of reading information from the hard drive. The problem is solved by switching to DMA mode, in which reading and writing information is much faster.

Check newly installed hardware. In many operating systems, especially Windows, new drivers can cause hardware conflicts. Windows usually warns you when you install conflicting devices. To check this, go to Device Manager. This can be done through the control panel. Select System > Hardware > Device Manager. Review the status of the equipment and, if necessary, make changes to the equipment settings.

Check recently installed programs. Some programs require a powerful computer to run comfortably. If problems start after starting a program, then the problem is in it. If problems begin immediately after the system boots, then the program may start along with the operating system.

Check RAM usage and CPU load. See which program is "eating" your computer resources. To do this, launch the "Task Manager". Right-click on the "Taskbar" and select "Task Manager" > Processes. CPU load is displayed as a percentage. The Memory section displays how much memory each running process is consuming.

Listen to the computer. If you hear extraneous sounds when the hard drive is operating: beeping, grinding, clicking, turn off the computer and run diagnostics on the drive. The sounds may also come from the fan cooling the processor. Under increased load, the processor heats up and the fan has to work at higher speeds to ensure sufficient cooling.

In this article we will learn and answer the question of how to check your computer for viruses; several programs will help us with this. I want to analyze and go through the topic of checking for viruses in more detail, but again without installing antiviruses, but only downloaded repositories.

The best methods for checking your computer for viruses

In total, I came up with three worthy tools:

1. EsetNod 32.
2. Kaspesky.
3. Dr.WebCurelt.

Below we will analyze each in detail.

I'll write in advance while loading, or during the time, there is no point in running the computer (such methods also exist), they are not very effective due to the fact that many files simply cannot be extracted.

Esetnod 32 - checking your computer without antivirus

First comes Esetnod32. I liked it, but see my choice below:

Viruses really slow down your computer, as do large pictures of the site that can be used.

• Easy to use, no tricks required.
• In Russian.
• Works in the background.
• Does not interfere with the main antivirus.

Let's move on to the analysis, the online antivirus website at www.esetnod32.ru, then look at the screenshot.

Click on the “Launch ESET Online Scanner” button, which will open a new window in the browser with the following instructions.

Manufacturers cannot just give you the product, and they ask you for your email address, fill it out and click “launch”.

Then the system warns us that this is a super program and it fast deletes everything in the world, click “run”. If you are working in a browser other than internet explorer, you will have to download a file weighing 2.7 MB. If you access the site from IE, such a window will not appear. In any case, click “download ESET Online Scanner”.

Then the trivial function of approving the license agreement. We read everything, if we agree, check the box and start.

There are several verification options, I settled on those described in the screenshot below. I unchecked the standard checkbox to immediately remove malicious files.

That's all with ESET, the check will be long, it will take a lot of time to dig through my 622 gigabytes. Wait for the work to finish and report whether there is a threats or not (I found 13, when the rest are from article 2-3).

Kaspersky Virus Removal Tool - scans for the presence and removal of Trojans

In second place I put Kaspersky Virus Removal Tool, it is good at searching for and removing Trojans in files. This is a cool and fast scanner, it works fast, free, without installation, and based on the principle of cloud scanning.

Cloud scanning is a popular feature lately. It does not require the user to install the program, because it is installed in the cloud, and the user is given only the exe file itself, that is, the one that launches it.

In general, we need to go to the Kaspersky website and download.

Then the initialization process will begin, the software communicates with the cloud and downloads the necessary data.

And the final thing is to click on the “start verification” button.

Based on the results of the scan, you will be given either an empty list or a list of threats. But you must answer the question of what to do with the files yourself, so look carefully, and if there are any suspicious ones, delete them.

This is where Kaspersky is finished, let's move on to the next one.

Dr.Web Curelt - looks at the system completely

Last on the list, but not least, dr.web curelt immediately checks the entire system on the computer. The famous Doctor Web, go to the website drweb.ru and look at the screen.

Page of this particular tool, click “continue”.

A new page will open, which warns that the free version will send reports to the server, but this will not affect you in any way. Check both boxes.

After the end there will be only one option - to neutralize it.

I am again surprised by the speed of Dr. Web. I found one file, this is the host. I don’t know why, but the Internet connection file seemed suspicious, I neutralized it, because I know that it is updated every time it is loaded. All is clear.

Another tip is to download these three programs to an external drive. If necessary, check your computer for viruses from a flash drive or using an external hard drive.

conclusions

Of all of them, I liked the last one, simply and quickly, it answers the question of how to check a computer for viruses and neutralize them. I wanted to choose the best of the best, I needed results and my choice for dr.web.

Bottom line, today we learned and answered the question of how to check a computer for viruses, three programs helped with this:

1. Dr.WebCurelt.
2. Kaspersky Virus Removal Tool.
3. Esetnod32.