Windows Update RPC error BatchPatch Forums Home › Forums › BatchPatch Support Forum › Windows Update RPC error This topic has 1 reply, 2 voices, and was last updated 7 years, 1 month ago by doug. Viewing 1 post (of 1 total) Author Posts March 6, 2018 at 5:01 pm #10181 dougModerator Windows 2012 R2 does *not* have special/different port requirements as compared to other versions of Windows. Possible causes for ‘RPC server is unavailable’ are outlined here: Troubleshooting Common Errors in BatchPatch Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In