My computer has been starting slowly for the last few weeks. I use ATF and TFC cleaner and defragged my hard drive. I use MS security essentials and Malware Bytes with no problems found. Today I ran SFC /SCANNOW and it said it needed to install dll files from XP disk, so I did that. Now the computer will start up and shut down every few minutes. It will do this over and over. I tried system restore and it could not restore to an earlier time. I am now running in safe mode. I did up the ram from two 512mbs to two 2gbs several months ago. Have event codes; 1003, 7020, 7034.
XP Pro, Intel D930 3ghz on Intel DX975 motherboard, 4gb of ram.