R rockstream Member Joined Aug 20, 2013 Posts 20 Aug 20, 2013 #1 I have been getting random recurrent BSODs, mostly when I am doing various tasks, but occasionally at night--it is not easily reproduced. They occur about every 24-48 hours but frequency can be shorter or longer. I built this computer in May 2011 with Windows 7 Ult 64bit OEM (which I purchased and installed). Reinstalled OS about 2-3 months ago and then moved system to SSD. Additional external HD attached using separate SSD as cache. ASRock Z68 Extreme4 MB Intel 2500k CPU w Integrated Graphics only 850W Corsair PSU I ran this computer overclocked stable for years. Since the BSOD I have removed overclocking, all BIOS entries as default now. Thank you for your help. Please let me know what additional information you need.