Hmmm, so .5 is not great, but not that bad either. NDIS related to networking, so try going into device manager and disabling the network adapter. Networking and display drivers are usually the main offenders. You can safely disable them for testing and your computer will still be functional.
Basically the idea is to go through the list of drivers and disable them one by one until the problem goes away. Then you can try to update the problem drivers to fix it or as a last resort, replace the hardware.
Honestly those numbers shouldn't cause you so much trouble. Try checking Task Manager when the problem occurs to see if other background processes are using too much CPU.
Have you done done basic system tuneup stuff? Never hurts:
https://www.cantabilesoftware.com/glitchfree/