Many versions of Windows limit share connections to just 5 connections. So right there, you have the wrong OS.
Windows Home 7 is indeed limited in this area.
i have setup 6 windows pcs and they all have the same exact hardware. I installed windows on one pc and set everything up then just made 5 clones. they are all booting perfectly, and everything works great. HOWEVER
(the users will be using guest accounts along side a administrator account which they WONT have the password to do administrative tasks)
all BUT two pcs are playing nice, THEY wont let any guest account access file shares, or let any connection through unless the program is ran from the administrator account and the guest account is logged out.
The two pcs that are problem can access each other as guest but not the other pcs, none of the settings were changed, they are all default windows 7 home premium, all settings are default and the ONLY software installed is the software that came on the deployment, nothing else could possibly be installed because only i know the administrator password. and ontop of that if a program isn't on the white list it wont be allowed to run and its the same across all the pcs. all the settings go back to the default every time the account is locked or logged out.
never had this problem before and just curious of what could be doing this, the only thing not the same in the two offending pcs is they have an extra larger disk ontop of the default oem disk.

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