I have a client with 2 offices in different locations. Each office has a fileserver which holds a database for a program used for theit business. The Fileservers are on Windows 7 Pro, and have a drive shared with full permissions for "Everyone", with password protected sharing switched off. Most of the other PCs are on Windows 7 but 2 or 3 are on Windows 10, all working fine. I installed 2 new PCs, one on each site and both asked for a username and password when accessing the shared drive on the fileserver, entered a username and password valid on the fileserver and all worked and they remembered the username and password, however a few days later, both asked for username and password again. When you enter the details, all works OK but it is a nuisance and I can't see why only these 2 ask for it nor why it lasts for a few days then refuses access again. Any suggestions would be welcome.