Windows xp can't access network folder?

Question

Windows

On a local network, each user has an open folder on the network.
Versions of Windows: xp, 7, 10.
Reinstalled windows on one PC to 7. I installed an MFP printer there and shared the folder with scans.
Occasionally there is an error. All PCs on which windows xp is installed cannot enter the folder with scans in the network environment - "access error, insufficient rights." although at the same time it goes to other network folders with a bang.
Only restarting the PC on which the folder with scans is stored helps.
What could be the problem?

Answer 1

Most likely in this version of Windows where the folder is shared, the number of network connections is limited. in home versions of XP, there can be no more than 5 connections. You can not restart the computer, but go to management - shared folders - sessions and clear the list of connections.

Answer 2

Maybe there are more than 10 users?