Basicially 1st install = BSOD's and BlackSOD's without curser, CTRL + ALT + Delete does nothing, ran memtest and had some bad memory. 2nd install - New ram installed, installed all the latest drivers from manufactureres website, flashed Bios with latest driver, after all this it still lags/freezes/hangs up. No more BSOD's but still have BlackSOD's occasionally. Took my Creative SoundBlaster Audigy 2ZS soundcard out, heard it could cause the freezing. Helped a little, but still lags/freezes/hangs up. 3rd install - Did same as 2nd install, this time without the soundcard and Creative drivers, still lags/freezes/hangs up. It got really bad when I installed the latest audio driver from RealTek (Since I didn't have my soundcard anymore I was planning to use the onboard sound). After installation of the Realtek driver it prompted for me to reboot, after I clicked reboot, it just wouldn't reboot or load into Windows. It wouldn't even boot into Safe Mode. After numerous times of trying to get to Safe Mode I was finally able to by rebooting, but it took about 5min to boot into Safe Mode. I went into Event Viewer and there were TONS of errors, mostly driver issues and system file issues. I gave up, took battery out of mobo, cleared cmos. 4th install - Had trouble with this because for some reason the Win7 cd couldn't detect my C:drive. After numerous tries I gave up. I had my brother give it a shot and for some reason, he rebooted my PC (which I've done numerous times) it was able to detect C:drive. After installation, I went back into Bios --> Load Defaults and as it sits right now, nothing is installed yet, not even Win7 Update, not a single driver and it STILL, lags/freezes/hangs up. I pulled up event viewer, there were warnings in the applications side about slow loading times, and then there were errors in system, which were 'Performance power management features on processor 1 in group 0 are disabled due to a firmware problem. Check with the computer manufacturer for updated firmware.' I enabled speedstep and that seem to have hopefully resolved that issue, but the computer still freezes/hangs up/lags. Any suggestions before I move on and do the updates and install of all the latest drivers? I also checked device manager and there are no exclamations points. Everything in there is functioning properly. Here is a complete list of the hardware attached to my computer. Ultra LSP750 750w Power Supply WD Caviar Green 1TB 32MB/SATA-3G EVGA GeForce GTX 260 SC 896MB PCIe w/Dual Link DVi OCZ Gold 6144MB PC16000 DDR3 2000MHz (3x2048MB) EVGA X58 SLI LE Intel X58 Socket LGA1366 MB LG 22X DVDRW SATA w/o Software Cooler Master Elite 330 Black ATX RoHS Case Samsung HD501LJ 500GB Internal Sata HD Seagate ST3500630AS 500GB Internal Sata HD USB devices: The Logitech Wireless Desktop Mouse And Keyboard MK300 Western Digital My Book Essential 1TB USB 2.0 External Hard Drive WDBAAF0010HBK-NESN - Retail I need help bad! FYI, all the installs were clean installs on a brand new HD. All parts listed above are brand new, except for the Samsung HD, Seagate HD and WD External HD.