Dzinerbear - a bit of insight on your problem. The errors or messages concerning resources - low etc... has to do with your system ram. This computer is loading and retaining many programs and dynamic link libraries into memory. Most of the libraries are normally released and the memory is freed for new use when the program or server has destoryed the created object or instance. Sounds like the setup configuration of the network is causing this computer to do all the tasking of the entire network. Remember the memory resources has nothing to do with available disk/drive space.

I would reconfigure the network with no shared drives especially if this network does live on the net - helps restrict viruses and worms. You actually might have totally reinstate the operating system on that troubled computer.

Hope that helps some but I can only guess without seeing it for myself and using some diagnosis tools.