If so then you start updating one driver at a time. Checking after it is updated that everything works. Once all drivers are verified then you can actually move all your settings over.
If it messes up then you will know it is a OS issue.
Regardless the problem with cmos is either a low battery or someone has changed your settings.
Check to make sure no floppy is in the boot order and disable floppy drive seek.
Save all changes and exit. Do you then still egt the floppy drive error or checksum error?
As for the other installation I mentioned above here are the instructions.
Parallel Installation of Windows XP
Boot to the Windows XP installation cd by pressing a key when the "Press any key to boot from cd" prompt appears at the top of the screen.
- At the "Welcome to Setup" screen, press Enter to set up Windows XP.
- Accept the License Agreement by pressing F8
- With your current installation selected in the box, press Esc
- Select C: Partition1 [NTFS] in the box and press Enter
- To continue setup using this partition, press C
- Now you should see formatting options...choose the last one, Leave the current file system intact (no changes), and press Enter
- To use a different folder, press Esc
- Name the folder WINDOWS0 (just type a 0 (zero)) and press Enter
The data will be located in the Documents and Settings folder (C:\Documents and Settings) under your old user account name...so when you set up the new installation, give yourself a slightly different user account name.