I am trying to reload Windows XP on a machine but after it goes through copying the files and reboots, it either goes to a black screen, gets to the XP screen and the blue squares freeze rather than moving across the screen or even the XP logo appears but the screen is very dark and the logo is barely visible. I originally tried a repair install but without success due to the above. I reformatted the drive during the reload but don't seem to be getting anywhere, I have run WD diagnostics and the drive seems to be fine, I have checked the memory and it seems to be fine. I tried another hard drive and still have the same issue. The pc was fine until a couple of days ago it installed some updates that seemed to take an age to install and then it wouldn't boot up. Any suggestions as to the cause of the issue?