I was using avast! Internet Security with Windows 8 Pro on a laptop successfully (for approximately 3 weeks) until I experienced the often reported miniport driver problem.
Shortly after noticing the miniport problem I had problems with devices connected to my USB 2.0 & 3.0 ports. Resolving the miniport driver issues and rebooting did not resolve the problem my USB ports.
Even uninstalling Avast! Internet Security and reinstalling only resolved the problem for a couple of hours.
I uninstalled Avast! a week ago and I’ve not had any problems with my USB devices since.
Has anyone else experienced this problem?