Services and protocols
I sit on a corporate network, and services state is:
Disabled: 45
Automatic : 26
Manual: 24
Security apps services: 8
Most of those set to manual, could really be disabled.
All these services are a potential security risk, and ALL of them are switched on as default. It is really amazing just how much unneeded stuff are running on a PC.
In the network settings remove 'File and printer sharing for Microsoft networks'. Many people think this is needed for being on a MS network, but the explanation reads 'Allows other computers to access resources on your computer' - and thats exactly what it does.
Remove all unwanted protocols, and now we have dumped efficient NetWare for clumsy Windows, this normally means that you remove anything except IP.
Windows is a swiss armyknife system, it has fair tools for everything, but not the real professionel tools. Remove or disable EVERYTHING that you are not going to need, and your systems will run smoother and with fewer errors. Throw out excess luggage.