haha thanks. go to my computer, then right click on the C: drive and then scroll down to properties, then next to the general tab, you will find the tools section, click that and than select "check now" under error checking. when that window pops up, select both "automatically fix file system errors" and then "scan for and attempt to recover bad sectors". then you will be on your way. this is the most thorough test, and it will take multiple hours to complete... the more data on your drive, the more it has to check. after that is complete try a memory test. first off, try using "Windows memory diagnostics", just search it in windows 7 (if you have vista I think you can still search). after this, if you still havent found a solution then you can use memtest, but that is the last resort because you have to make a disk to boot off of... etc. Also did you update your graphics driver? how much ram do you have? do you think you can post system specs?