Boot problems can be caused by several things. The authorized way PC boots is when it is initially started up and BIOS loads. This is generally accompanied by a beep that verifies a successful boot. Frequently, boot problems happen after BIOS loads. The system will have problem starting into Windows. These boot errors can be linked to both software and hardware problems.

POST Problems

1. Initially, you should decide if problem happens during boot sequence or after boot has finished. The POST, or Power-on Self-test, tests PCs keyboard, drives, memory and other hardware. If any tests fail, PC won't boot. On Dell 8100 Dimension, you must notice Dell logo screen when it's first turned on. Under the logo is a bar. The bar must fill up all the way and vanish; means Power-On Self-test has finished.

If bar does not fill up, attempt a various power outlet and take out every peripherals and hardware. Again install peripherals and hardware one at a time to separate problem. If you see only a blank screen and no logo, try removing and reseating memory cards. If one has been dislodged, it can avoid PC from starting.

Windows Errors

2. When POST is successful, problem is associated to Windows. You may have a particular error like HAL.DLL, NTLDR or NTDETECT is lost or damage. These errors are occasionally repaired by Windows. To do this in XP, Put in Windows XP CD and press any key at prompt.

Select Repair option. Vista has a choice known as Startup repair that will do similar thing.
If repair does not work, again install Windows or Run Dell's "PC Restore by Symantec." Begin restore utility by pushing F8 key as PC starts. In Advanced Boot Options menu, push down arrow to choose "Repair Your Computer." F8 should be pressed before Windows logo appears. Or else, Advanced Options menu will not appear and you must try again. Dell's PC Restore will remove all on PC, so be certain to back up main files. PC will be restored precisely the way it was when it was bought.