I was trying to secure my netbook so I added avast in replacement of microsofts security software and did some updates on programs. I attempted to add and older version of a mediaplayer from a download site and google chrome refused to download and said it contained malware. Everything seemed to be working ok but when I ran the first Avast scan it found several threats and recommended a boottime scan. The boottime scan hung at 42% for hours and never completed. I have tried to run other scans and had problems with freezing in both safe mode and regular and at this point I'm not even sure I can boot to regular mode for sure. I tried last known good config and two system restores from safe mode and neither would take. I'm currently on a different pc. Can you help me?