This instructable we learn to how to uninstall OS in Windows XP (but if you do try this, the Windows Uninstallation will load and the Windows XP will uninstall, Once the DOS tries this, The Early version of Windows ME, 98 SE or 98 will boot into it.
Step 1: Login to Windows
You must login as administrator to continue this step.
Step 2: Click Start Menu
Click Start menu at the lower left corner to continue
Step 3: Click Control Panel
Try this step in Start Menu
Step 4: Click Add or Remove Programs
If this was unusable, You're not the administrator, Login to Administrator (no need from safe mode.).
Step 5: On Menu
Click Windows XP uninstall and it's size is least 300MB
Step 6: On Button
Click Remove/Change on Windows XP uninstall program
Step 7: On Dialog Box
Click Uninstall Windows on radio
If you upgraded from Windows 98, Windows 98 SE or Windows ME
Step 8: Click the Continue Button
And will be uninstalled from XP to ME/98/98SE
After this step, You'll receive the warning message
Also press the Enter or Spacebar
Step 9: Confirm That You Want to Uninstall
If you click Yes, the dialog box with Performing label will appear
Step 10: This Computer Will Automatically Shutdown
and will boot to MS-DOS 7/6
Step 11: Wait for Windows (no XP) Logo to Appear
Like the installation process, but we may to uninstall the OS Windows XP.
Step 12: Wait for Uninstall Phase to Boot Into Windows 98/98SE or ME
Please take the less break depending on computer speed and CPU speed
Step 13: Finally, We Finished Uninstalling Windows XP and Windows 98/98SE or Windows ME Has Booted Up
and will be finished the Uninstall Windows XP and then will boot to specific desktops and OSes: Windows 98/98SE or Windows ME.