Hi, XP Pro PC. When I start the computer I can start in safe mode but when I try to start in normal mode it loads to the log on screen. I type the username and password in then it starts to load but stops after a few moments with a blue screen. The error is Stop: c000021a (fatal system error) The windows subsystem system process terminated unexpectedly with a status of 0xc0000005 (0x7c9106c3 0x0055f36c). Begininning dump of physical memory. I have uninstalled AVG, also taken out the graphics card and uninstalled all the drivers for it. I have also changed the RAM. I have also done a chkdsk. Earlier on it wouldn't even get to the startup screen before I got a blue screen so I have done a repair install of windows using the original disk.