Bruce I can't remember the exact wording but it is possible to have a
message appear telling you that you have used up all your activations, I
should know I've had it happen to me enough times
To be honest I have
two
copies of Windows XP that tell me that I've used up all my activations
sitting on my desk at the moment. However, as has been pointed out, a
simple
telephone call to the activation line should solve the problem. As you say
there is no limit on the number of activations. In my case the problem was
due to installing VMware Workstation beta and allowing it to set an 8GB
partition fro XP when, really I needed more room. When I received a full
copy of VMware I uninstalled the beta, reinstalled the RTM copy and decided
to install XP again on a 14GB partition. Upon attempting to activate I got
the 'sorry you've used up all your activations' message. I then tried my
second copy of XP and that resulted in the same message ( the 120 days
'grace' period hadn't expired) because I was in a hurry I finally ended up
using my third XP product key and this one activated without any problem.