MikeInPoulsbo

The problem disappeared after a couple of Microsoft updates on 3/3 and 3/4.

I have 3 computers on my home network, two are Windows 10 desktops, one is Windows 7 laptop. I'll call them 10-1, 10-2, and 7. 10-1 can see 10-2 and 7. 7 can see 10-1 and 10-2. 10-2 can see 7 but CANNOT see 10-1. What can cause this problem? All are Ethernet connected to the same router.

Looking back the first occurrence of this problem was on 2/13. A lot of updates occurred on 2/12.

This happened about 3 days ago, maybe after some Windows 10 updates were installed. The main consequence is that I can't run Apps now and my file associations also were screwed up . How do I get my admin configuration back to the way it was? The method described in "http://www.tenforums.com/tutorials/2969-administrator-account-enable-disable-windows-10-a.html" doesn't work.

Don't know how this happened although multiple auto-updates occurred in the last few days. My file associations are all screwed up, in particular photos (JPG file) want to be opened by the "Photos app". Evidently no apps can be opened because of the Built-In Administrator attribute. I've tried to reset that using the suggested commands using the elevated command prompt (net user administrator /active:no ) but that doesn't work. At first I was able to change the file associations for file types I particularly cared about to non-apps and that worked. But yesterday I received an alert that due to some sort of problem (the alert didn't stay on long enough to see what the problem was) the file associations would not be used and sure enough that is what happened. Help!