Create a password protected administrative account that is capable of installing software but restricts the user's ability to create new user accounts

1) Use TweakUI to make "User Accounts" in "Classic View" control panel to disappear.
2) Force the control panel to show only "Classic View", because "Category View" will show the category, "User Accounts". Create a "ForceClassicControlPanel" DWORD value in the HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer registry. If "ForceClassicControlPanel" is set to 0 then the Category View is ON. If "ForceClassicControlPanel" is set to 1 then the Classic View is ON. Deleting the "ForceClassicControlPanel" value re-enables switching between views.

Setup NVidia Firewall to allow access to a print server

1) Create a new custom profile "X", based on High (your choice).
2) Activate and follow the wizard, "Windows File Sharing and Joining a Domain".
3) Set UDP/TCP Port 1900 to both, ALLOW.
4) Save settings and turn off firewall.
5) Add print server to windows as a new default printer, be sure to leave your printer ON.
6) Print something to test print server. If print successful, continue. Otherwise, fix your print server settings.
7) Turn the firewall ON, set to profile "X".
8) Printing should now be successful.