Thx for any help. Computer is high-end Cyberpower game computer circa 2008 with Windows Vista Home Premium SP1. Computer is not typically online and has never had a breakdown. Late June 2016 I experienced the 'Black screan of death' while playing Soliaire. I cleaned all dust from computer box and motherboard (very little anyway). I was able to establish Safe Mode and ran all the typical off-line 'repair options, last known good configuration, past restore point', etc. Still not able to "normal boot" start. No error messages appear. I downloaded the few documents and pictures I wanted to save, then inserted the backup Windows Vista CD that came with computer and re-installed Vista like brand new. Now computer only boots in Safe Mode. Went into msconfig - Turned off Microsoft Windows Services, made sure Safe mode box was unchecked... still not able to boot into 'normal Vista". I have attempted various "fixes" found in this forum and others without success. I don't know what else to attempt at this point. Hard drive scan shows no file corruption. Could this be a hardware issue? Any help would be appreciated.