Before we get into the details of the fix process, there are a few things I should note. First, the process involves messing around with the Windows installation files so be sure to follow my instructions exactly as written or you could mess up your system big time. Also, you will need to start and stop the Cryptography service a few times during the process of fixing the issue -- but only that one service, so don't be messing with any of the others so as to have the wrong thing turned off and having an unwanted effect on your system.
When turning off the cryptographic services, you may use the following procedure if you're not comfortable with using the services manager in the control panel:
- Click Start.
- Type cmd, but do not press Enter. If using Windows XP, click Run; type cmd.exe; press Enter; and skip to step 4.
- Right-click cmd.exe and select Run as Administrator. If using Window 7 or Vista, confirm the UAC prompt.
- Type net stop cryptsvc and press Enter
- Type exit to leave the command prompt.
When you're done with a troubleshooting step and are ready to try launching your game again, simply attempt to start the game; the cryptograpic services will automatically resume, so there's no real need to start them manually.