1. download malware bytes.
2. update both malware bytes and avast!
3. run another scheduale boot scan with avast!, then run a full scan with malware bytes, if this doesnt fix the issue, go to 4.
4. go to run > cmd > type "tasklist" , copy all the output from the cmd and post it here.
5. and please watch out when you surf, if you have to enter into dangerous sites, use a sandbox (like the software sandboxie).