I'm having an issue with using the error checking process with Windows XP Home edition. The issue is this: When I go to "My Computer" clicking on asking it to run the error checking program - it then asks if I want the error checking program to run the next time that the OS starts. I click on yes and then proceed to restart the machine. What I encounter next is VERY disturbing. When the machine attempts to restart I get a blank screen that provides no information as to why it is blank - nothing. (long story longer, I'm very disturbed about this situation.) Acting as if it has not found the root directory to boot my XP program. When I attempt to go to the Safe Mode - it will not load the necessary drivers. When I click on 'Return to most recent working configuration' it is a coin toss if this resolves the situation of the computer successfully booting. However once the machine decides to successfully reboot (using the Return to most recent working configuration' it then will continue to properly reboot (warm boot up, cold boot.) untill i decide I'm ready once again to attempt a error checking fiasco! Which once again starts the same as it initially did not start. Last piece of the puzzle for one to consider that has more computer savvy than myself is that prior to this occurrence I used a program call 'Ultra Defrag" I'm hoping this is not the cause for the issue but can't think of anything else that may have caused my computer to act up this way. Can anyone help?