I ran into a problem using Lavasofts Ad-aware, it hijacked my browser to MSN.com. It took me a long time to figure out what was happening. Lavasoft says coming versions of Ad-aware wont do this.
If your home page is set to about blank you might run into the same problem I had.
It seems that some hacker is using about blank as a way to get around spyware removal programs. So when you run Lavasofts Ad-aware it shows a possible browser hijack when you have set your home page as about blank. If you allow Ad-aware to fix this, it resets your browser to the Windows default of MSN.com.
If this is the problem you are having, instead of allowing Ad-aware to fix the problem, select the possible browser hijack and mark it to be ignored.
If you are worried that your system is infected, first run Ad-aware with your home page set to MSN.com, if it runs clean, then change your home page to about blank and run Ad-aware again, then mark the possible browser hijack to ignore.
That is EXACTLY what is happening, although I am sure I still have spyware not being recognized by AdAware. Thanks for the info.