Computer boot up

There is either a problem with the graphics driver not starting properly or the boot.ini file of the operating system is corrupt. First thing to try is press F8 on boot up and this will take you into safe mode, if prompted for a password just press 'enter' When in safe mode highlight the line 'Last known good configuration' and press enter for a reboot, if all boots ok then it should be right. If still no screen, press F8 again on next boot up and this time select boot windows in safe mode and if it boots ok, there maybe a graphics fault or a driver error for something that starts on boot up, as in safe mode only the minimal drivers start (hence safe mode). If you get into safe mode first, right click my computer>properties>hardware tab>device manager, then go down the hardware list to graphics adapter,and click on '+' sign to your adapter, right click on line and select uninstall. Restart the pc then it will be automatically installed again and the drivers loaded. If you are still unable to boot then it is a process of ilimination to find what is causing the problem, but it will more than likely after trying the above be a windows system file error and require you to use your XP disc for a system repair.