To convert and upgrade Windows XP Home to Windows XP Professional, follow 8 step below.

Windows XP will start up as usual. After logging into the desktop, check the system properties to verify that it’s now Windows XP Professional.
- 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.
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Windows XP will start up as usual. After logging into the desktop, check the system properties to verify that it’s now Windows XP Professional.
