Advice 1: How to check whether antivirus

Modern antivirus are designed so that their work can be imperceptible and not onerous for the user and the operating system itself. They control everything that happens on the computer but do not attract attention as long as there is a threat of infection. Therefore, to detect the anti-virus program is not easy.
How to check whether antivirus
Examine the icon tray next to the time indication. Antivirus programs place their icons in this area. If you configured to hide the taskbar shortcuts will automatically expand the whole list of icons by clicking the special button in the shape of a triangle.
Run "task Manager". The main task of this utility is to display all the processes currently running in the operating system. Find the process corresponding to the name of your antivirus. If it is in the list, it means that the antivirus is running. Also worth noting is that modern antivirus programs are set up in such a way that the task Manager may be from one to three processes at the same time. Try not to disable manually, as this can lead to serious consequences.
Open the program window of antivirus via menu "start". Set antivirus program to check external media or folder on your hard drive. If the program window is open, and it performs basic tasks, it means that the antivirus is running. Try to scan all local drives of a personal computer. It may take from several minutes to a few hours, depending on the amount of data stored.
If you want to check react your anti-virus on malicious file, create a text document and enter the string X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*. Rename the file from text to com and check antivirus. Effective antivirus program will report the threat immediately when you try to rename the file extension.
Run the antivirus program can be stopped due to a failure in the operating system. The antivirus program may not work properly if you have installed already infected environment. Make external treatment for virus and reinstall the program.

Advice 2 : Why the mouse stops working

The mouse has long been a familiar attribute of the personal computer, the vast majority of cases it works without any complaints. But sometimes a PC user faces a situation where the mouse completely stops working or does not work as it should.
Why the mouse stops working

One of the faults of the manipulator can be damage of microswitches. When such a malfunction, the mouse start to not respond on clicking one of the buttons.

Other kind of physical malfunction is breakage of the wires where they exit the housing of the mouse. It happens in the case that the mouse a lot of use – for example, when working with graphic programs.

Poor performance of the wireless mouse is usually connected with discharged batteries.

If the mouse slows down, that is, periodically for a second or two freezes on the screen, try to reinstall the motherboard drivers, graphics card and monitor. In many cases, one of these actions helps to cope with the problem.

Another reason for the freezes of the mouse may be a bad graphics card cooling, check if it works mounted on it a fan and how clean the radiator. If the radiator in dust, clean it. Of course, this should be done when the computer is off.

The reason for the poor performance of the optical mouse may be defective Mat. Try experimenting with different surfaces, often unable to find a suitable alternative.

One of the reasons of occurrence of problems with the mouse may be a viral infection of your computer. Update database your antivirus and completely scan the system. Configure the antivirus program on a daily and better hourly update, it will save you from many troubles.

In that case, if the cause of incorrect operation of the mouse cannot be found, try to boot with any Live CD. If the problem with the mouse disappears, then the fault lies not in hardware, and operating system. If you find a fault fails, reinstall OS in update mode. This reinstallation will not affect your files, programs and settings, but will update parts of the OS.

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