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trying to go back to windows 7, but having issues verifying key
my client had win 7, upgraded to 10, then experienced the dreaded blinking cursor a few days later. even though there is a windows.old directory, it won't allow me to go back to an earlier build. so, i figured i could get the serial off the machine and just reinstall win 7, but when i went to microsoft for verification, it did not take the serial, referring to it as an upgraded install serial.
?!?
did upgrading change his initial product key? does that mean i have to find a OEM windows 10 disc and retry install? is his chance to go back to win 7 gone forever? can i re-layer another 10 install over things to get the machine to boot again?
thanks for this help!
berbes