Thanks for the reply.
I forgot to say what the environment is :
The office is an occupational rehab service and is a small 3-PC office, running a "Windows Workgroups". The tape drive has been installed in a 'desktop' pc, not a server however the specialised software my customer uses stores the data on the PC with the tape drive.
My problem is I do not know what the settings were for the machine at the pre-crash state (domain, users, odbc drivers etc.,) and the custoemr is demanding the machine be returned to its original state.
My other problem is the custoemr has recently moved premises and has, conveniently, lost the software and the manuals.
Is there a procedure for doing a full-system recovery ?