Use a reputable virus-scanning software
And when I say reputable, I mean one recommended by a friend, with a name you recognize. The Russians may not have much of a sense of humor, but their sense of irony is extremely well developed. One of their favorite ways to distribute malware is through fake virus-detection software. If you don’t have any friends, go to the computer store closest to your house and ask the first person you see without a Russian accent what antivirus program he recommends.