NIS 2010 and Network + Network Printer Issues

 

I have a small business with about 6 PCs networked through a router and have a networked printer.  I was using just the Antivirus alone with no issues.... then I installed NIS about a week ago and everything seemed to work fine. But then... after a week or so.. I am finding issues on the network.

 

With no change to the network, a few disturbing things have happened over the past two days:

 

1.  All shared drives were disabled from central PC runnig NIS.

2.  The shared network printer stopped working, nor can it be pinged from any PC. 

 

I am just about fed up with NIS to the point I am considering eating the costs of the 6 3-year licenses and removing NIS all together.

 

Some things I have tried...

 

1.  I had to remove NIS entirely from our server PC just to allow all PCs to access the shared drives..

2.  I tried disabling all the firewall features I think were relevant.. no luck.

3.  I tried adding the printer as a device to the network security map.. placed PC and printer in FULL TRUST.. no luck

4.  Remote monitoring, computer discover off.. no luck.

5.  I tried to ping the printer's IP address.. and the PC says the IP does not respond..

 

Is there any way to just turn off ALL features except the antivirus?  Maybe I could start from there. 

 

Any help is appreciated..

 

-R