System Won't Reboot On Demand

Hi There, I have just finished reinstalling Windows Xp, so my PC is clean of viruses & spyware. I have found that whenever I need to restart the PC that it just hangs on the shutdown screen and then the mouse freezes. I then need to press the reset button in order to complete task. If I need to shut the system down then that works fine. I have a Socket 478 AOPEN mobo, 80gb Western Digital Hard Drive, 256Mb DDR 400 RAM which I have already replaced. I have also replaced the IDE cable from the hard drive and removed the IDE from the FDD. I have an ATI VGA card AGP also I had a PCI 56k modem which I removed. Is it more likely to be a hard drive failure or a mobo failure. Any suggestion would be greatly appreciated.  
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

This is more likely a Windows XP problem than a hardware problem.

I'm not 'into' XP so I'll let someone else help you but in the mean time you can stop juggling hardware and put the system back to the hardware configuration you want it in.
Look here for a shutdown trouble shooter : (one of the best)

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Your system drivers may be faulty, causing a shutdown problem. Install the latest updated drivers for your board from AOPEN:
as well as ATI for video:
Do the same for any PCI cards and peripherals. For the mouse and keyboard, update drivers only if non-standard.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.