What type of network are you on? The firewall will open it on a domain network.
As Puppy Breath says, 135 is for RPC. More correctly, it is the RPC Endpoint
Mapper port. It is used by remote systems to find RPC services on your
system. Those are used for remote management
If the firewall is in the public profile 135 should be closed. If it is not,
that would be a problem.