Wild & Crazy W2K professional errors

Wild & Crazy W2K pro Networking Error
OK, I installed win 2k clean with the NTFS filing, got it all setup & good to go. Could get on the LAN & browse all users & access the internet.
But when you tried to copy a folder from 1 workstation to the w2k machine it would start to transfer then go black and automaticly reboot. We could transfer other folders just not this 1 inpaticular folder. WTF is the deal with that.
Had to connect the 2 systems via a file transfer program in order to move the folder onto the w2k mach.
This is not so much a question, as I have already resolved it. But how i don't know.
Now the system is just getting worse, with errors like you dont have permission to view that file or folder. When working on the system it wont even let you create a new generic folder. The day before, the system would let the user copy folders, create folders along with access to all of them. Is it just me or is the windows 2000 making changes on its own?

Just wondering if anyone else has come accross this.
Thanks