Sharing Issues

[KT45]

I seem to be having some problems and am wits end that I hope I can get some help with. I have 3 computers on my LAN and we all have internet access with no problems and I am able to view and access all computers. However if I get on of the other 2 computers in my network, I can see host computer but cannot access it. Get the error about may not have permissions. I have not changed anything that I know of as at one time they all worked together without any problems. I have checked all the tips I can think of in Registry, etc. Any assistance would be appreciated.

 

[Bluemouse]

I have the same problem, and its like that on all 3 computers. Cant really figure out why, but two of the OS's are XP Pro sp2.