Start with windows 2000 then windows xp.
Start > Run > Registry Editor > Windows XP
Search it in your start button.
They look different.
This happens when you incorrectly reinstall Windows XP. The installer creates two entries in Boot.ini; one for the existing XP installation, and one for the one you just installed.
Windows Explorer in a Windows XP operating system, can be opened by double clicking on the "e" in the start menu. Windows XP has been termed obsolete by Microsoft. Windows XP computers no longer receive critical updates to prevent against viruses.
Ntdetect.com
The following booting files are required to start Windows XP: NTLDR, Boot.ini, and Ntdetect.com. The following files are optional when starting Windows XP: Ntbootdd.sys and Bootsect.dos. The following files are required to start Windows 7/Vista: Bootmgr (Windows Boot Manager) and BCD (Boot Configuration Data).
You can not simply remove the Professional option from XP and revert back to Home. To take a machine from Windows XP Professional to Windows XP Home you would first need to wipe the machine (format the hard drive), then reinstall the Windows XP Home operating system. It makes little sense to do so, however, because Windows XP Professional is a hardier operating system and can perform better network tasks than Windows XP Home. Windows XP Professional Edition is the business edition of Windows XP Windows XP Home Edition is the home edition of Windows XP you cannot replace XP Professional with XP Home Edition unless you erase the windows installation and start over why would you want to do this XP Professional contains all the features of Windows XP Home Edition
You'll need to edit boot.ini and add an entry for Windows XP.
Windows XP is a general name given to sevearl operating systems released by Microsft in the early 200's. These include: Windows XP Home, Windows XP Pro, WIndows XP Stater, Windows XP Media Edition, WIndows XP Tablet, Windows XP N, Windows XP K and Windows XP KN
Press the Windows key and "R" together.