Type: cscript ospp.vbs /unpkey:XXXXX (Note: You need the last 5 characters of your current installed key. If unknown, first type cscript ospp.vbs /dstatus to see installed keys, then use /unpkey with those digits).
Alex tried to ignore it, but then came the dreaded pop-up. "Error code: ." According to the Microsoft Support forum , this meant the Software Licensing Service couldn’t find the license—essentially, Office had forgotten who Alex was. error code 0xc004f017 office activation
Stop the Office Software Protection Platform service: Type: cscript ospp