Computer Specifications Operating Systems: Windows Vista Types of computers used: Desktop Computer Number of Windows Vista installations: 1 Manufacturer: Other / Not Listed Make & Model: vista home premium build 6000 Processor: 2.67 Gigahertz intel core 6700 2 duo, 64 kiobyte memory cache,4096 kilobyte secondary memory cache Motherboard: MAIN CIRCUIT BOARD DG 965RY Video Card: Nvidia GeForce 8600 Gts display adapter 256MB Memory: 2 GB RAM 240 pin ddr2 sdram Hard Drive: ONE 300 gb Monitor: lg Generic PNP Anti-virus Software: Norton AntiVirus Sony DVD AW- G170A ATA Device When i boot my comp up its starts to boot up then the screen goes black with the mouse pointer still on. It stays that way for five minutes. And i reboot about 3 times it does the same thing. After a few times of rebooting it comes on to windows desktop. I am not sure if its the monitor or the video card.