I already given you the best explanation I can. When my computer shutdowns in a non-proper fashion, Avast's firewall settings are reset. On the next startup Windows becomes nearly unusable because of the firewall. Non-proper include but are not limited to: force power off, Windows Key > Shutdown > Save Data Prompt > Shutdown anyway, BSOD, random power off. I am on the latest Avast Internet Security (also happens on premier), as it's set to auto update (which it still prompts me for -_-). Despite that, this has been happening for quite some time now.