Your question has been well answered here, but I just have one other thing to add after reading your other question:
http://www.experts-exchange.com/Q_24333410.htmlA lot of viruses are actually spread FROM Flash Drives because of the way Windows automatically tries to open the contents when you insert one. While you are scanning your system for viruses, also scan your flash drive(s) and all other media such as CDs or DVDs you have created in the last while, because they too could have infected files on them.
