I recently upgraded all of my computer components, but the problem existed before this, just not as consistent. I was running Windows 7 64 Bit Ultimate (RC Client) and it kept crashing on me at completely random times. It could have gone minutes, hours, or even days, but it was inevitable. I did all of the suggestions I read on other forums, trying old RAM, running the memtest, etc... The memtest would randomly come up with the only error being WinVC, but that was never consistent. I had Corsair replace my RAM with new stuff and still received the same issue. I figured it was probably an issue with the RC Client. I put Windows Vista 32bit back on, and the problem went away, for awhile. I can not remember completely, but I am pretty sure it froze all the same, randomly. I recently upgraded my computer to the follow specs: AMD Phenom II 945 x4 3.0 GHz Quad Core Processor G.Skillz Ripjaw Series 4GB (2 x 2GB) DDR 1600 RAM (Runs at 1300 default) Sound Blaster X-FI Xtreme Gamer Sound Card ASUS EAH4890/HTDI/1GD5 Radeon HD 4890 1GB 256-bit GDDR5 Western Digital Raptor X 150GB 10000 RPM 16MB Cache SATA 1.5Gb/s 3.5 Windows 7 Professional 64 Bit The problem still exists. Only this time, it only ever happens after my computer has been shut off for the night. Upon first boot up, I will get to the windows login screen, and within 2 minutes it will crash, flash a quick BSOD, usually IRQL is less than or equal to..." and then restart. I have to hold the power button and force it to shutdown (if it restarts on its own, it crashes again sometimes), then turn it back on, and it runs fine, for the rest of the day. I can restart it with no problem. It is always just that initial boot up first thing in the morning that causes it to crash once. Anyone have any ideas? Oh, the only old hardware components are my sound card, and my hard drive. It isn't the sound card because I had this problem with on-board sound as well. Is my hard drive going bad? Please let me know if you need any more information. Edit: I forgot to mention, the hard drive was completely formatted. I am running a fresh Windows 7 Install, with minimal programs installed on the computer. I thought purchasing the real version of Windows 7 would eliminate the problem, so I received and installed it yesterday, but I guess not.