Quote Originally Posted by bobkn View Post
Quote Originally Posted by Ex_Brit View Post
64-bit XP (with or without SP2) cannot be upgraded to any other system. You will have to do a clean installation.
That's also true of the 32 bit versions.

SP3 is needed to qualify for the use of an upgrade license (for a clean install).

I imagine that there aren't many XP X64 home users who were disappointed to find that they couldn't make legal use of a Win8 upgrade copy, but there are at least a few.
Not many, in all the years I've been around I only met one person who was running it. It was such an expensive proposition in those days anyway. I guess we have to wait for the OP Charchit to respond before we can advise further.