Hello everyone, first off i would just like to say hi, seeing as this is my first post. Recently my brothers PC has started to develop a problem during gameplay, the screen will freeze then either restart or return to normal after a few minutes, then repeat. I managed to work it down to the graphic card driver (nv4_disp) being the problem (did a search and found some interesting threads, but didn't solve my problem). This driver also caused random "0" characters and other characters on the BOOT screen. After uninstalling the driver and using an older one the characters went, but it only lasted for a few hours, if that. Anyways, i then decided to re-format the hard drive but it will not let me. I used the repair screen which allowed me to enter the "format c:" then asked for confirmation which i put "Y" and then nothing happened. I also tried deleting the partition using the XP CD but that didn't let me either, it said something like, "Unable to delete, important files used in setup are in this partition". So i am stuck, could it be the gfx card packing up, the driver that is causing it all, BIOS problem or hard drive problem? It has never happened before. *SPECS ARE* Asus P4S800 mobo 10.09 BIOS 2.4ghz Prescott Intel P4 1gig of RAM (not too sure on make) XFX GeForce 6600 256mb gfx card * I hope you can get through all that info. I look forward to your replies.