Hello, I'm writing a program and now trying to find a way to check to see if a Windows XP CD-Key is valid. Obviously the algorithm is not known, but is there an API call in Windows that could do this ...

I did a search and didn't find any results concerning this problem. I've just built a new system and my Windows 7 disc won't boot, so I'm installing Windows XP so I can then install Windows 7 on top ...

The Windows Activation system periodically checks for the validity of your key. If you have a genuine key and suddenly receive Windows Activation Error 0x800704cF ...

If you are receiving a Windows Activation Error code 0xC004E016, 0xC004F210, 0xC004F034 and 0xC004F00F, they all point to the same thing – Invalid Product Key or ...