HI guys this is my first time posting in this forum. I have a problem with a BSOD. "A clock interrupt was not received on a secondary processor" About 2 weeks ago I upgraded my OS from Win 7 32 bit to the 64 bit and got the BSOD for the first time.. I took my comp up to a tech and he did a full test on everything and found no problems except for a few setting were off in my BIOS so he fixed that and sent the comp home with me. The last few days I have been getting them again. Ive searched for a fix online and come up with nothing. My system specs are here Mainboard : ASRock A780GXE/128M Chipset : AMD 780 Processor : AMD Phenom X4 9600 Black Edition @ 2300 MHz Physical Memory : 4096 MB (2 x 2048 DDR2-SDRAM ) Video Card : ATI Radeon HD 4770 Hard Disk : Hitachi (750 GB) Hard Disk : WDC (500 GB) DVD-Rom Drive : HL-DT-ST DVD+-RW GWA4164B ATA Device DVD-Rom Drive : HL-DT-ST DVD-ROM GDR8163B ATA Device Monitor Type : AL2223W - 22 inches Network Card : RTL8168/8111 PCIe Gigabit Ethernet Adapter Operating System : Windows 7 Home Premium Home Edition 6.01.7600 (x64) DirectX : Version 10.00 All my drivers are up to date aswell as the BIOS. The one thing I have read about is TLB erratum and how 64 bit OS's wont work well with it but most of the post are older and out of date. Any advice will be greatly appreciated.