You did a repair install of XP Professional with an XP Home disk. That is your problem right there. Nothing can be done now about it other then you will need to format your hard drive and do a completely new fresh install with the version of XP you have and it's correct corresponding key.
If you have data you need to get off of it, then you can try doing a Parallel installation of XP before you completely reformat. the instructions on how to do that are as follows:
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 Windows installation should begin. This will install Windows to a new folder, leaving your data intact. Any programs installed on the old directory will have to be reinstalled to the new one. Device drivers will also have to be installed for all the hardware to work as it should.
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.
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