"for some reason your system denied access to the hosts file. if any hijacked domains are in this file, hijackthis may not able to fix this..."
then suggested to run: notepad C:\Windows\System32\drivers\etc\hosts
when i did, i cant find any hijackthis line/s.
I am using vista which the message also suggested to simply exit HJT, right-click in the HJT icon and choose "Run As Administrator", which I also cannot find in the right-click menu of HJT icon.
By the way, I downloaded HijackThis V.2