First things first, what operating system? Is your antivirus up to date? Do you have adaware, spybot etc antispyware installed?
You can always create a new shortcut to the desktop: right click, new > shortcut.
Also don't forget system restore if your os is xp or millenium.
Given the little info I would first make sure that AV is up to date and then do a full scan, then run the antispyware. Do these in safe mode.