You can update the definations manually.
Get the latest from http://www.avast.com/download-update
After the update, run a bootscan with avast.
Let us know the result.
I have attached the hijack hunter log and the log from DrWeb. I clicked on “move” after the doctor web scan, not sure if it did anything. DrWeb is currently the anti virus running. It keeps catching stuff.
Now we have some problem since you have installed dr.web not used the free version,anyway you can uninstall it and install avast!.
Dr.web resolve the problem and there is a small effort you should do now
1.from hijack hunter window go to restorer tab then check
Restore SHOWALL
Enable show hidden files
Enable show system files
then click apply,you may promoted to reboot or log off then follow the advice.
2.copy the folloing code to your command prompt and press enter
No left them BUT ENSURE NO ONE WILL RUN THEM better to edit the acls of them so no one can open them.
After that install avast and scan moved files AND DO NOT RUN THEM for your safety. msdn.microsoft.com/en-us/library/ms229742.aspx
Any problem now?