My computer setup George is a Dell laptop running Windows 7 Home Premium Edition, and I have a wireless mouse.
I have it configured to go into sleep mode whenever I close the lid.
When I open the lid again I enter a password to unlock the screen which then goes straight to the Desktop and it's ready to go.
I've never had any mouse freezing issues with my current computer.
There are various options to set through your Control Panel for Power saving, which is available for laptop or Desktop PCs.
I have found in the past that having screensavers running can cause freezing problems. I used to have a screensaver on my old Desktop PC which had Windows 7 and I had random freezing when I moved my mouse to deactivate the screensaver. Disabling the screensaver eliminated that problem for me.
All I can suggest George is to go through different options in your Power Saving Preferences and see which configuration works best for you, without freezing.
I trawled the Internet for solutions to my screen freezing problem, but no-one seemed to have a specific answer to suit everyone. One solution worked for some people, a different solution worked for others.
Trial and error for now I would suggest George, unless any of our other members can offer anything else, or failing that an Internet search maybe