Hackers can use viruses to steal your files, block your computer, and find out your passwords to sites where you are registered. Yandex may notice when your account has been hacked and suggest that you change your password. Before you change your password though, check all your computers for viruses. Otherwise a virus can find out what your new password is using the same method it did for the old one.
If your computer is totally blocked, try unblocking it.
You can quickly scan your computer for viruses and delete them using the free Kaspersky Virus Removal Tool or Dr.Web CureIt!. This tool re-downloads every time you need to do a quick scan of your computer to ensure that you are using the most up-to-date version.
You can protect your computer against viruses using antivirus software that regularly updates its list of known viruses. We recommend setting up an antivirus that regularly monitors your programs, rather than just scanning your computer from time to time.
Proprietary antivirus software usually includes more functions and options than free versions do. But a free antivirus can also provide you with the necessary protection.
Here are some popular free antiviruses: