Many Trojans, once on a computer, deactivate the antivirus first. In this case, removing malware from the system and restoring the full operation of the antivirus program become top priorities.
Instructions
Step 1
Most often, the anti-virus is damaged if the anti-virus databases are not updated in a timely manner. New viruses and Trojans appear every day, and you can get them on your computer simply by visiting an infected site. If the antivirus has stopped working normally, you should use special utilities.
Step 2
Regardless of which antivirus you have installed, you can use the free Dr. Web CureIt! ® utility. You can download it from the manufacturer's website: https://www.freedrweb.com/cureit/?lng=ru. This program will scan your computer and remove detected viruses and Trojans. After that, reinstall your standard antivirus and update its databases.
Step 3
If the infected computer fails to boot, use the Dr. Web® LiveCD rescue disk: https://www.freedrweb.com/livecd/?lng=ru. The program will help save important data and will try to restore the system to work.
Step 4
Other antivirus vendors have similar utilities. You can find a large selection of useful programs on the Kaspersky Lab website: https://support.kaspersky.com/viruses/utility. With their help, you can remove malware and restore normal computer operation. After removing viruses, open the main window of Kaspersky Anti-Virus, click the "Tools" button. In the "Recovery after infection" section, click the "Run" button.
Step 5
Some Trojans block the antivirus by moving the computer's system time forward or backward, as a result the license key is invalidated and the antivirus stops working. In this case, restore the correct system time: "Start" - "Control Panel" - "Date and Time". After that, update the anti-virus databases and run a computer scan.
Step 6
If you have to reinstall the antivirus program, first remove it using the standard uninstallation tools. There is a special emergency uninstall utility for Dr. Web, which is useful if the standard uninstaller cannot remove the damaged program. You can download this utility here:
