How to activate Windows 7 by phone?
By the lack of support from Microsoft, activation of Windows 7 is more difficult, phone activation may be required.
Start the console CMD (By typing " CMD " in the start menu) as an administrator and type the command:
slmgr -rearm
And use the key again, if the above does not work use the telephone activation instructions.
Telephone activation instructions ( Error 0x80072F8F):
1. Enter code and select activate.
2. click back, then select Telephone activation.
3. Rewrite the numbers from step 2 to https://key-soft-activator.pl/ ( 9 x 6 digits ).
4. enter the received Confirmation ID for step 3 i confirm.
5. done, the product has been activated!