windows 8.1 pro with media center upgrade caused office 2013 to require activation code

Hi,
one of our users updated their windows 8 to 8.1 pro with media center and immediately afterwards, she tried opening excel and it required her to activate office 2013 again so now she doesnt know keycode but why would this happen?
Tried running system restore but her only restore point is the same day this happened so no good.  Any suggestions?
dankyle67Asked:
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aadihCommented:
Please call Microsoft Office 2013 Activation phone number for help.
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McKnifeCommented:
This is a bug. Ask Microsoft (although it won't help). Phone reactivation will succeed after talking to someone at least.
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flubbsterCommented:
Download and install Belarc advisor:

http://www.belarc.com/free_download.html

It will give you a comprehensive report including the product keys/serial numbers of virtually every program installed.
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dankyle67Author Commented:
I actually called microsoft and they said the product key showed up as never being activated which is strange since they user has been using the office suite for 8 months until this happened.  I had the user contact microsoft activation support and they were able to have her download the office 2013 for home and business since the one she had was the professional version which is also strange since the product key we had was for home and business so im assuming that whoever did the install for her had probably installed a trial version of office 2013 pro but the version that came with the laptop was the home and business version since thats what her product keycode came up as when microsoft searched for it on their database.  Thanks for the info since the Belcarc will help for future issues when we need to locate product keys/serial numbers.
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aadihCommented:
Great.  :-)

Note: Belarc will not give Office 2013 key (or the correct key). :-(
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dankyle67Author Commented:
Ok thanks for the clarification.
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