my pc,\n\nCPU: (Quad-Core)IntelÂ® Coreâ„¢ 2 Extreme QX6850 @ 3.00GHz 1333FSB 8MB L2 Cache\n64-bit\n* CD: LiteOn LH-20A1H 20X Double Layer DVD+-RW Super Allwrite + Lightscribe\nTechnology\n* FAN: INTEL LGA775 CERTIFIED CPU FAN & HEATSINK + 3 EXTRA CASE FANS\n* HDD: Single Hard Drive (200GB SATA-II 3.0Gb/s 8MB Cache 7200RPM HDD\n* MOTHERBOARD: (Quad-Core Supports) Asus P5N-E nForce 650i SLI Chipset\nLGA775 FSB1333 DDR2 Mainboard\n* MEMORY: (Req.DDR2 MainBoard)2GB (2x1GB) PC6400 DDR2/800 Dual Channel\nMemory (OCZ Value Select or Major Brand)\n* NETWORK: ONBOARD 10/100 NETWORK CARD\n* OS: MicrosoftÂ® Windows Vistaâ„¢ Home Premium (32-bit Edition)\n* POWERSUPPLY: Hiper Type-M SLI/Crossfire Ready 580 Watt Power Supply\n* SOUND: HIGH DEFINITION ON-BOARD 7.1 AUDIO\n* USB: Built-in USB 2.0 Ports\n* VIDEO: NEW!!! NVIDIA GeForce 8800 GTX 768MB 16X PCI Express Video Card\n\n\nthe problem,\nvarious programs that worked when i installed them have now stopped working\n(oblivion,bioshock,fear,printmaster etc)and i get a box up that says "...exe\nhas stopped working" (sometimes instead of ...exe it has the name of the\nprogram instead). and sometimes if i manage to get the program to run it'll\nget so far then the whole computer freezes and i have to press restart.\nI have run chkdsk and it got to "chkdsk is verifying filedata (stage 4 of 5)\nthen it froze.the HDD light just stayed on no flickering like it does when\nhdd is being accessed...i left it like that for 5-6mins just in case,then\npressed restart button ,chkdsk ran again,, same result! everything is either\npatched up with the latest patches or has the latest drivers, i've checked\nfor viruses and malware etc, is my HDD fubar? should i just buy a new hdd or\nis it a software/vista problem?\ncheers!