Our IT has set me up with a new computer, new OS (Win8.1), and new IVF (2013_sp1.3.202 on VS2010). Not being satisfied with the standard Help, which lacks features I was used to, I also installed MS Help Viewer 1.1. So several things have changed.
Everything is fine except access to Help, which is intermittent. Initially (after any restart) it works fine, but after some time--which includes shutting VS down and running other programs--any attempt to access Help results in an error popup window as follows:
Window title: Microsoft Help Viewer 1.1 - Catalog VS_100_EN_US
[BrowserSafeguard] The socket connection to 127.0.0.1 failed.
No connection could be made because the target machine actively refused it 127.0.0.1:47873
Rebooting always fixes it, but the fix is short-lived.