FRom what Ive headrd it still has bugs and needs a lot more development work on it - I think they've released it for users to find the bugs for them.
Why not click the link provided by Caesar and read about it for yourself.
If you want help here - this is your best bet - as suggested by Fox :-
Download hijackthis from
http://tomcoyote.org/hjt
Unzip, doubleclick HijackThis.exe, and hit "Scan".
After the scan has finished the "scan" button will turn into a "save log" button
save the log file and paste it here
Do not delete anything yet, as most things hijackthis finds are harmless and needed.
steam