First time poster, bear with me... Have been running Avast Free on a Lenovo laptop with Windows 7 SP1 since 2011. Never had a problem. Got a notice for the latest update sometime ago but Holidays got in the way and didn't update until yesterday. Ever since, computer will work OK for ~15-20 minutes then Windows will become completely unresponsive; only action is to turn off and reboot. I read through this thread, tried Repair, regular Unintall, Avast Clear, no change. Called Avast Tech Support and they wouldn't touch it, said it was a Windows problem not Avast. Avast broke my computer!! Now what?