My computer crashed and I had to install everything from scratch.

I have a XP Media OS and plenty of memory (2-gbite) and disk space.
After installing and trying to launch, I got following error
message . . .

Microsoft Access couldn't find file 'C:\WINDOWS\system32\system.mdw".
This file is required for startup.

I tried running the workgroup administrator and get following
error . . .

An error has occurrd at changing workgroup database.

I did a global search in my drive C:\ and it cannot find system.mdw

Please help.