Hello,
Any Particular Reason you want to Disable these Policies??
The Option "Enable this Policy" with the Virus and Spyware Protection Policy -
Enables a policy and assigns it to a location or group. These Policies are enabled by default.
Note: You cannot disable a Virus and Spyware policy or a LiveUpdate policy.
As shown above, you could either Delete, Withdraw OR Replace the Policy.
Hope that helps!!