Windows server 2003 STOP: c0000218 {Registry File Failure} Error

I am using Windows Server 2003. My server instantly crashed with bluescreen when I turned it on. The screen refers to some registry file failure error. The error code is -- c0000218. The message says --- The registry cannot load the hive (file): \SystemRoot\System32\Config\Software or its log or alternate. It is corrupt, absent, or not writable.The system restarts and again the same error on screen. I tried to go in Safe Mode and recover AD. But yet nothing worked. The system use to work fine, and suddely this registry error appeared.

Your system is in some serious trouble. Try to run Chkdsk first and then see what you get. You can also run startup repair. This are the only common things that can help you. Registry errors are serious. Your entire system will be unstable if the registry does not work properly. I have some links of windows support that can offer you a bit detail information on troubleshooting the errors.

How to recover from a corrupted registry that prevents Windows XP from starting
Registry troubleshooting steps for advanced users