Before upgrading any existing Windows installation, it would be prudent to
run the Upgrade Advisor for Windows XP. This tool will report what hardware
or software may be incompatible with Windows XP. If you follow the Upgrade
Advisor's recommendations, you should not have any problem upgrading to
Windows XP.
If you fail to utilize the Upgrade Advisor, you may run into incompatibility issues.
Just inserting the Windows XP Upgrade CD in the CD Drive and selecting
"upgrade" is not going to give you the desired result. You must "prepare and
plan" your computer before beginning the upgrade process.
It is imperative that you have the latest BIOS update installed. Visit the support
website of the manufacturer of your computer or motherboard for instructions
on updating your computer's BIOS.
Also, physically disconnect all your peripheral hardware devices,
especially USB devices (not including your mouse, keyboard or
monitor). Uninstall any antivirus program, too!
Have you made sure that your PC's hardware components are capable
of supporting WinXP? This information will be found at the PC's
manufacturer's web site, and on Microsoft's Windows Catalog:
(http://www.microsoft.com/whdc/hcl/default.mspx) Additionally, run
Microsoft WinXP Upgrade Advisor to see if you have any incompatible
hardware components or applications.
You should, before proceeding, take a few minutes to ensure that
there are WinXP device drivers available for all of the machine's
components. There may not be, if the PC was specifically designed for
Win98/Me. Also bear in mind that PCs designed for, sold and run fine
with Win9x/Me very often do not meet WinXP's much more stringent
hardware quality requirements. This is particularly true of many
models in Compaq's consumer-class Presario product line or HP's
consumer-class Pavilion product line. WinXP, like WinNT and Win2K
before it, is quite sensitive to borderline defective or substandard
hardware (particularly motherboards, RAM and hard drives) that will
still support Win9x.
I just attempted this a few weeks ago. Although the upgrade seemed to
go OK, many of the applications were messed up. After trying to fix all
the stuff that was wrong I finally ended up doing a clean install of XP
PRO. That was a much better experience and I now have a fine running
PC. Much better than W98/se I might add.
Do the clean install. It may be a real pain to reinstall everything,
but it's worth it. Look at it this way, it will also allow you to clean
up all that stuff that has been accumulating on your machine and not
being used any more.