Recently I used this site for a help in solving a virus problem:
The problem was successfully solved, thanks for the great help!, and the topic was closed.
However, after the intervention for eliminating the virus (I was advised to use ComboFix), my computer became very slow. I tried whatever I could think of trying to solve this myself - such as disk defragmentation and cleaning - but did not have success.
My computer runs under Windows XP Professional, my antivirus program is Norton AntiVirus. Check for viruses does not find any. ComoFix was uninstalled after the virus problem was solved.