it could be something else. It sounds like there's a bad block on the disk where Windows is trying to keep its page file. You could run it with /f or /r after it, but in the event there's an issue and it tries to fix it, you could lose the data on the block that it fixes, so just scan it first. Alternatively, event viewer will have a log of system errors. Give that a glance, as it could be something else. It sounds like there's a bad block on the disk where Windows is trying to keep its page file. While likely not an immediate concern, I would probably look into backing everything up in the event the hard drive decides to play for keeps and take all your data with it. A bad block is a sign of a disk rounding the toilet. Could be another year before it eats it, but take this as a warning and take the necessary steps to ensure you've got all your stuff somewhere just in case. I'd definitely agree with Mr. Jones here, a backup as a precautionary measure is always a good idea, especially when chkdsk has good results. If you want to be thorough, you may try burning a copy of http://www.seagate.com/www/en-us/support\\... and running that to confirm that there are/are not HDD errors detected.