R
Rohit Sutradhar
I have an old pc which had windows 7 ultimate installed and activated. I have used the pc without problems for years. I recently tried to upgrade to windows 10, successfully updated it to windows 10, found out that my desktop is too old to support windows 10 and decided to revert back to windows 7. But after reverting back, my windows got deactivated and when I try activating it, I get the the 0xC004E003 error and activation fails. I tried updating to windows 10 again but when I entered the same product key during installation, the installer said it was invalid and the update failed.Things I h
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