Hi Tim,
In order to save your files, that is, My Documents is to boot into Windows Vista and copy My Documents folder off of the Windows Vista partition. Once that is done, reboot the computer. Go into your Computer BIOS and change the Boot Order to boot the CD-Rom Drive first. Then restart the computer and boot from the Windows XP Professional CD.
You then need to reformat and reinstall Windows XP Professional fresh.
Procedure to Reinstall Windows XP!
If you want to save any files, make a backup of those files off the Hard Drive and proceed.
0. - Turn off the printer.
1. - Go into Computer Bios and Set Defaults and Exit, if you know how.
Make sure the Boot Order is set to Boot to CD-Rom Drive First.
2. - Insert Windows XP CD into CD-Rom Drive.
3. - Reboot the computer.
Note: If Windows XP is installed, working okay, you will need to Press a key to boot from the Windows XP CD.
If you are using an Upgrade CD, and the computer boots directly from the CD, you will need to furnish a qualifying previous version of a Windows operating system's Installation CD, in order to install Windows XP from an Upgrade CD.
4. - Welcome to Setup.
5. - Reinstall XP - Press Enter
6. - F8 - I Agree
7. - Esc: Don't Repair
8. - Select Partition to Install Windows XP on.
Use UP and DOWN ARROW Keys to Highlight Partition.
9. - Press Enter.
10. - Press C to Continue.
11. - Highlight the Action You Want To Take.
Type of Format you want to perform.
12. - I selected Format The Partition using the Fat File System.
13. - Then Press Enter to Continue
14. - Warning Message
15. - Press F
16. - To Continue To Format Partition with the FAT32 File System.
17. - Press Enter.
18. - Now it formats.
19. - After Formatting It Checks The Drive.
20. - Then Copies files to partition.
21. - Now it Reboots to Windows XP. Don't press a key to boot to CD.
22. - And now it installs Windows XP.
23. - You need to be here now.
24. - Starts at 39 Minutes to Complete.
25. - At 33 minutes, you need to set Time and Time Zone.
26. - And Enter The Product Key.
27. - At 29 minutes, you need to pick the Network.
28. - Now wait for Reboot and you are done.