Hi, I've been having many problems with my PC for a few months now, this is an overview of whats been happening: The first problem began on startup when scanning IDE drives, the dots would just go on and on until eventually a message stating "No Hard Disk detected, Press F1 to resume". I would then restart the machine and it would work fine for a few weeks until the message appeared again. It would then work fine again for a few weeks. After a while the PC would always hang on the scanning of IDE drives on the first boot up but then always work fine after a restart. Then the PC began loading fine but would always freeze after a few minutes, I restart it and it works fine. I now get this problem every day I use the PC. I also once had this message on startup "Windows could not start because the following file is missing or corrupt - \windows\system32\config\system. I ignored this and have not seen this message since. More recently I have had two BSOD messages, one while playing a video on Youtube and one while running a routine Virus scan, These messages have been IRQL_NOT_LESS_OR_EQUAL. The most recent problem now is that my monitor is not picking up the signal first time when I turn it on during the boot phase, it only picks it up the second time. EDIT: My PC will also occasionly run Chkdsk by itself on a startup. Some details on my PC: System Microsoft Windows XP Home Edition Version 2002 SP3 Computer: AMD Athlon(tm) 64 Processor 3500+ 2.20 GHZ, 1.00 GB of RAM Any help with the causes of this would be much appreciated, thanks.