OSX 10.11.5 update Windows 7 shared folders connection failed
I recently updated my Mac to OSX 10.11.5. Before updating I was on the most recent version prior, not sure the previous number but I was already in El Capiton. I have a MacBook Pro (Retina, 13-inch, Mid 2014)
I had a very basic file sharing setup FROM my windows 7 desktop PC. I had the folders shared on my Windows 7 PC WITHOUT any password protection. I am not using homegroups or anything, just the standard function where you right click on the folders in windows 7, choose properties, then use the sharing tab to allow everyone on the network to access certain folders.
Normally I would open finder on my macbook, click on my windows PC in the left column under shared section. The windows PC is named "yale-pc". I would be prompted on the macbook to sign in or connect as guest. I have always had to connect as guest because the login method requires a password, but again the windows network has no password. Once connected as guest I could open my windows folder and select the media files for playback on the macbook.
NOTHING has changed on my windows PCs. All my other network devices still work fine and can access files from my windows 7 PC with no problem at all, so I know it's still working.
But on my macbook when I now select the connect as guest the mac says "connection failed". Even the shortcut that I had on the Mac desktop to link directly to a folder called "TV" from my windows computer I have the same problem. I feel this recent update which I read was largely about securing network connections has caused a buggy scenario where I can no longer access my windows computer shared folders properly.
If I use finder and select go menu, then choose connect to server, and attempt to connect to "yale-pc" I get an actual error with this method. I will include a screen shot of the error.
The last and absolutely most confusing part is when I introduce a 3rd computer for testing. I have a different windows 7 PC called "game-pc" I fired this unit up strictly for testing purposes. Again all my other computers at home can view "game-pc" shared files with no issue.
When I try to connect to "game-pc" from my mac I have the same issues. HOWEVER for some reason, in finder shared column, if I click on "yale-pc" then "game-pc", and then click BACK to "yale-pc" IT WORKS!! I can access and play my files from the "yale-pc" on my mac. But it only works if I turn on both my windows 7 computers, then alternate between selecting one then the other from the finder column. This proves that it IS possible for my Mac to connect, but only with the extremely inconvenient method which requires me to turn on two separate windows computers just to access the files I need from one.
Like an idiot, I don't have a time machine backup so that's not an option.
No idea what's going on, I use my mac everyday to access media video files from the windows PC which actually has the harddrive space to hold my collection.
MacBook Pro (Retina, 13-inch, Mid 2014), OS X El Capitan (10.11.5), Windows 7