Start Up Problems in Windows XP

What is Windows XP?
Windows XP is a line of operation systems created by Microsoft for use on both personal and corporate computers. In the past it has come pre-loaded on thousands of computer from desktops and laptops to netbooks and media centers. It was released in 2001 as the next in line after Windows 2000 and Windows ME. It has since been replaced by the currently used Windows Vista and soon, the upcoming Windows 7.
Look for Error Messages
Most start-up problems are from errors and conflicts with recently installed hardware or software.The easiest way to troubleshoot a start-up program is when the computer tells you what is wrong. If your computer gives an error message on start-up, write down the error message exactly and note if it pertains to a specific program.
Reboot
Rebooting has solved many a computer problem, but if a regular reboot doesn't solve yours, you will need to reboot into another mode. Restart your computer and when the screen first goes blank, press F8 repeatedly to get to the Windows Start-Up menu. Select 'Last Known Good Configuration' and continue to boot. If you received an error message pertaining to hardware or software, you can now uninstall it and restart your computer. If you are not sure what the error message pertains to or there is no error message, select 'Safe Mode' and when Windows loads, uninstall all recent hardware and software additions. Reboot and see if this solves the problem.
Troubleshoot Disk Errors
If Windows won't load and you receive a 'non-system disk or disk error' message, that means that your computer can't find Windows. This could be because it is trying to boot from a removable disk like a floppy, CD or jump drive. Remove these from your computer and reboot. If you still receive the error, you could have a hard drive issue. Try performing a repair installation of Windows with the system disks that came with your computer. If this does not work, your hard drive could have failed and you will need professional help.
Log-On Problems
If you've logged onto Windows XP and can't see any programs or your desktop, reboot your computer. When you click your user account or input your password, immediately press and hold the
key to prevent resident programs from loading. It is probably one of these programs that is causing the problem. To change what programs run automatically, right-click on your start menu and choose Explore. You can then open the Start Up folder and see which programs are running automatically and either remove them or change their start-up settings. Reboot your computer to see if this resolves the issue.
When Your Computer Won't Turn On
If your computer won't even turn on, you might have a power supply issue. First unplug your computer and try another device in the outlet to ensure it is not an outlet issue. Next reinsert your computer plug and attempt to start it. Check your surge protector and see if it has been tripped by a power surge and reset if necessary. If none of these things helps, you will mostly likely need to replace the power supply inside of your computer and professional help will be required.