I have begun experiencing random shutdown with my system. I recently re-built my first build adding an SSD, new motherboard, graphics card and memory. here is the system configuration: ASUS P8Z68-V PRO Intel Core i7 2600K Cooler Master Hyper 212 Plus 16.0 GB Dual-Channel DDR3 GeForce GTX 560 Ti 1gb Samsung SH-S223F DVD Writer 120 GB Patriot Wildfire SSD (boot drive) 1T Samg 7K 32M SATA2 and 300 GB Western Digital WDC WD3000HLFS-01G6U0 PC Power & Cooling Silencer 750 Quad 750W PSU Cosmos Cooler Master Case Samsung Syncmaster 2333 Windows 7 Pro 64-bit SP1 I ran the SF Dx tool and included screen shots of CPU-Z tabs and CBS.log filtered for just the SR (system restore) points from the sfc /scannow. Included all files in the zipped Seven Forum folder attached. Here are the issues: random shutdowns-periodically I will return to my computer and find a screen asking for a boot drive. hitting space will not work. i have to shut down using the power on button. Usually it boot into windows after the first time. Occasionally I have to power on and off a couple of times. screen bland for 10 to 20 seconds. Occasionally while switching between applications using Alt-Tab the screen will go blank for up to 20 seconds. It recovers on its own with a message saying my GPU shut down and was restarted. I have never actually seen a BSOD (am I in the wrong forum?) but would like to fix these problems. For a time I thought these were problems with my SSD and GPU but when I ran sfc and saw the number of files that weren't repaired I started having concerns. Oh and by the way I have run a variety of diagnostics on the SSD and GPU and nothing was revealed. Any thoughts? Next steps?