M marsmimar Active member Joined May 31, 2012 Posts 37 Location South Central Texas Jun 9, 2012 #61 About 3 months ago I started getting random BSODs. CPU and HDD temps increased, noticeable increase in fan speed on occasion, computer lagged, and each BSOD gave a different error. Long story short, it turned out to be a bad memory module, possibly damaged from a thunderstom about a week earlier. I decided to replace my factory installed 2x2GB with 2X4GB. The BSODs immediately stopped and I haved had any issues since (he says with some trepidation.) The point is, if it's a hardware issue a reformat probably won't solve anything. So do the experts think it's advisable to run Memtest86+, SeaTools for Windows (click download button on webpage), and/or any other hardware diagnostics?