LAN FIle and/or Service Search

Anyone know of a tool/script that I can use to find if a single file is present on machines on my LAN?

The file would be in the same place every time.

Same applies to a service. Need to know which servers have a particular service running or not on the LAN.

It's a lot of servers to audit, so looking for a way to save time rather than jumping into each one.

Thanks!