Convert and Upgrade Windows XP Home to Professional Without Reinstalling » My Digital Life

Convert and Upgrade Windows XP Home to Professional Without Reinstalling » My Digital Life
# Open Registry Editor (regedit).
# Navigate to HKEY_LOCAL_MACHINE/SYSTEM/ControlSet00X/Control/ProductOptions, where ControlSet00X is the one with the highest number.
# Delete the ProductSuite registry key.
# Then, create a new DWORD value and named it as Brand.
# Set the “Brand” value data as 0.
# Reboot the system.
# On boot up after the BIOS screen, press F8 to display Windows XP Startup Menu.
# Choose Last Known Good Configuration (LNG) and hit Enter.