Experiencing strange startup problems about 1 in 4 times when powering up in the morning. Will get one of the following boot failures : 1. 'Overclocking failed or overvoltage failed' (I'm not overclocking) 2. \windows\system32\config\system missing (ctrl-alt-del and its fine) 3. A blank screen just prior to when XP would normally start, with a blinking cursor at the top left (although this problem has happened less than 1 and 2) - A quick tap of Ctrl-Alt-Delete gets things working without further problems. Problems might be happening more on first boot in the morning. - I can shut down, unplug, wait 30-60secs, plug power back in, start up and get running ok 10 times in row with no problems once things are running - During operation, system has spontaneously restarted twice during operation of XP pro and applications, about once per week. - All parts are brand new, brought from Newegg, put together myself. Any ideas what is causing these problems ? System description: Motherboard : ASUS P5N32-SLI SE Deluxe BIOS : version 0401 (09/05/2006) CPU : Intel Core 2 Duo E6600 Conroe 2.4GHz Memory : CORSAIR XMS2 2GB (2 x 1GB) 240-Pin DDR2 800 Graphics: XFX PVT71PUDF3 Geforce 7900GS 256MB GDDR3 PCI Express x16 Disks : WD SE16 WD3200KS 320GB SATA 3.0 gb/s (x2 in raid 1) ; Seagate Barracuda ST3160023A 160gb PSU : SILVERSTONE SST-ST56F ATX12V/ EPS12V 560W CPU cooling fan : ZALMAN CNPS9500 Other peripherals : cd/dvd player Case : Antec Performance I P180B with 3 12cm fans on medium speed OS : XP pro w/ sp2 and fully up-to-date Measured power use via a 'Watts Up' meter : between 165-200W Reported CPU temp : 25-35C Reported CPU Fan speed : about 1800-2000rpm Reported CPu Vcore: 1.26-1.28v BIOS configuration: Overclocking : none Memory Timing : 4-4-4-12-T2 Restore on AC Power Loss : Power Off