Help with service pack two problem

[News]

Just installed SP2 on a pc running xp home. All went well until rebooted
when it says you must activate to log on - clicked ok to activate and it
loads the windows activation screen then says that it is already activate
and logs back off, tried logging on again and same thing happens.

Tried uninstalling sp2 in safe mode and says it can find a file and won't
uninstall. Tried system restore but won't have that either.

Any help would be much appriciated before i lose more hair over this
machine.

Tom

 

[Jerry]

Call the 800 number - it should appear when you're asked about activating.

 

[Tom B]

There is no option - i booted up the machine and loads as normal up to the
log on screen when a message box appear - it states "windows must be
activated before you can log on. Do you want to activate now?"

I clicked yes and the windows activation screen appears then it says already
activate then goes back to the log on screen. And everytime you try and log
on it repeats

It is definately a original copy of winows, has the COA sticker and
everything checks out.

I'm totally confused.