Well if you scanned your system and nothing is coming up, and it's not finding the virus it might be a little late to get to it. Try using a different anti virus software and see if it can get rid of it. If that doesn't solve it, then I would suggest a clean install of your OS to be sure to remove all viruses, only problem is you'll lose all your files on your computer. Once your computer gets infected to a certain point there is no return, especially if the virus, (which it sounds like) is effecting your "My Computer" and possibly even your system files. Next time, make sure your anti virus is up and running! and make sure to watch what other people are doing on your computer! Be careful of what you download, and even what you click on or open up on the internet. And if you decide to download things, make sure to always scan them before opening them!
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