I've had this problem off and on for some time. The most-recently posted solution worked for me.... until today when it didn't. I've double-checked, and all settings are exactly as I left them.
A few details:
- login name and passwords on all computers are the same
- OS on all computers is 7 premium or ultimate
- all computers are on same switch
- all computers have no problem getting to the internet
- all computers are on the same workgroup AND the same homegroup, with the same homegroup pasword
- all computers have had their "ask for password" option turned off (most recent "fix")
- upon getting the "enter network password" prompt, entering the ONLY password on the entire system results in "login failure: unknown username or bad password"
Sometimes everything works fine, then all of a sudden, it doesn't, then all of a sudden, it works fine again. Sometimes it's one computer that can't connect to anything, sometimes it's one computer that can't be connected to, sometimes it's one particular connection in one particular direction that won't work but the other direction is just fine (A connects to B, but B won't connect to A). Sometimes rebooting one or more affected computers helps, sometimes not. Rebooting the router never helps.
This is absolutely insane! How the bloody bleep do I get my computers to talk to each other all the time? This has only ever happened with Windows 7 machines. It didn't happen when my network was exclusively XP or 2000 (or at least it stopped happening when I gave every computer the same login).
Searching for this particular problem is also extremely difficult; how do you describe it? What's the problem called? The best I could do was search for the error message and got this thread.
Any help would be appreciated.