I was trying to play around with my old Windows Tablet PC, since I no longer use it as my main computer, I downloaded a crack file through my iMac for my Tablet PC. This file appear as usual, I transferred this file to my flash disk, and from there on I transfered it to my Tablet PC and run it. After running the crack file, my Tablet PC is not function well, I couldn't reboot probably anymore, now I am pretty sure it is because the crack file contains virus. I have no choice but to format my Tablet PC, it is such a painful job. The question now is there anything I should do with my iMac, nothing is happening to my iMac at this time, since the file I download was an .exe file, it can't be run on a Mac anyway, but I wonder will that virus hide somewhere in my Mac and spread to other computer? The other question is should I format my flash disk as well?