My OS is Windows 10 and computer is an HP. I can't seem to find the right computer ID no. that allows activation. I entered those on the Microsoft systems page and also the one under the Sound Forge serial number.
Which version of SF-9, the full (Pro) version or the LE version Sony included with certain models turntables. Did you download it from Magix or is it an old SCS (Sony) version on a disc, I do not think it is possible to activate old SCS or Sonic Foundry versions off-line, For on-line activation, you do not need the PC's #, just your SF-9 serial and the email address you used initially when it was registered with SCS.