After a repair job on my Windows OS, MicroSoft says I no longer have valid Windows. Is this problem

My repair job did not require me to remove and reload Windows. However, the traditional recovery process was not working, so I used my brother's OS disc (same brand and model as my computer) to reinstall damaged or missing components. I did NOT have to reinstall Windows. Anyway, my Live One Care immediately failed validation, and the most recent Windows update has resulted in aggravating popups and sign-on delays saying I'm a victim of software piracy. Upon contacting Microsoft, they gave me a choice - complete a list of details and requirments to prove that my machine is the original that had its own Windows OS, or pay them $100 to validate the software. I feel like this is a kind of extortion. THEIR system failed, I fixed it using the resources at hand, and now they want me to pay them for the work I did. It's insane. Has anyone else had this problem?

After a repair job on my Windows OS, MicroSoft says I no longer have valid Windows. Is this problem common?anti virus

Well i had the same problem when i did a REPAIR AS WELL, I Soon learned to use ONLY AND I MEAN "ONLY" The CD(s) That came with "**MY**" Computer to do the REPAIR Else I got an invalid Windows Error as well, And NO UPDATES are available either when you MIX repair cd's of two different computers. Best to do A Full reinstall with the ORIGINAL CD that the computer came with or that you BOUGHT FOR IT...