Summary 8.1 computer.
It came with a Trial Version of Office so you uninstalled it.
When you tried to install from your pen drive its not moving ?
I'm not sure what you meant by not moving ?
Is the file on Pen drive a mini executable which downloads the office version ?
Its my understanding that the when you activate does it go 3,2,1 as licences go.
Your code my not be valid from Microsoft can be simply its not the exact same product.
I would get in touch with the seller, and be prepared to open a dispute if no help comes forward.
So you have installed once and should have 2 licences left.
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