Give your computer a nightly Security Rest Period
Using the Windows AT Command

NetOff.Bat - Batch file To turn the internet connectivity off

@echo off
netsh interface set interface "Local Area Connection" disable
echo Local Area Connecton disabled		 suppress display of command lines
 
 

NetOn.Bat - Batch file to turn the internet connectivity back on

@echo off
netsh interface set interface "Local Area Connection" enable
echo Local Area Connection enabled		 suppress display of command lines
 
 

Setting the batch files to run automatically, using the Windows AT command

AT 00:00:00 /every:m,t,w,th,f,s,su NetOff
AT 01:00:00 /every:m,t,w,th,f,s,su NetOn

At midnight every Monday - Sunday run NetOff.bat
At 1:00 am every Monday - Sunday run NetOn.bat

See the currently scheduled jobs, using the AT command

 

Another Technique

You can also turn off your computer with the Network Connections feature of Windows

NetOff.bat - Batch file using Remote Access Service

rasdial /disconnect Remote Access Service disconnect

NetOn.bat - Batch file using Remote Access Service

rasdial "broadband connection name" user pwd Remote Access Service connect with your connection name, usually "Local Area Connection", your user name, and password

This is equivalent to using the mouse to Disable and Enable

Disable Internet connection

To Enable again