Originally Posted by Jimit Shah
If any body has some solution to this problem then kindly let me know.
You have many problems, not just one.
They all point to needing to run a repair on the OS. In order to do this you need to boot from a Windows 2000 Standard CD and use the repair (rather than install) option.
Yes, you could try to use a recovery console and fix each individual issue but this sounds very much like a systemic problem that is affecting the underlying OS and I think you'd mostly be hitting and missing with that. You would probably spend several days trying to root out each issue when a repair would fix it up and at least get the OS back to a state where it can be updated and your apps work normally in a couple hours, depending on the speed of the machine - and you don't lose any data doing a repair.
It is also conceivable you have a severe underlying hardware problem - bad memory, hard drive on the verge of taking a dive are two probable candidates - but a repair process would probably reveal this too (i.e., if the repair fails due to similar or weird, inexplicable errors that you also see from the running OS this points to a deeper hardware issue).
In short, I'd start with the repair process and move forward from there.