this may not be helpful but.....
Create a standard image for the PCs and a shared network drive for all users; inform users that only data on the shared drive gets backed up. Done.
Backing up individual PCs over the LAN is slow, prone to error, and a waste of space. Ideally you would want to do both a file backup and an bare-metal image backup of each PC, but all that takes a lot of time, disk space, frustration.
IF you do want to do PC backup, you need a server app like Symantec NetBackup could do the job, and they make an optional 'bare metal restore' agent.