Antivirus software is essential for safe internet browsing.

Yesterday, I downloaded malware in the form of self-extracting ArhSMS archives for the second time. KIS 2011 detected them during the download, but they had already been added to the registry. It doesn't seem to cause any significant harm, but the notifications about the detected threat are annoying. And if they had unpacked, they would have bothered me even more with offers to use paid services or something else.
The anti malware bytes program helped again. It detects and removes infected registry keys and spyware that masks viruses. You can download it for free on the official website.