http://www.computerhope.com/software/drwatson.htm

And this is what my HJT log analyzer says:


CHECKING HIJACKTHIS, INTERNET EXPLORER, WINDOWS AND SOFTWARE FIREWALL:

You are using the latest version of HijackThis.
You are using the latest version of Internet Explorer.
No software firewall detected. If you are not using a
hardware firewall, it is highly recommended to install one.


THESE ARE EITHER HARMFULL OR A SECURITY RISK
WE STRONGLY RECOMMEND TO FIX THEM :

o16 - dpf: yahoo! pool 2 - http://download.games.yahoo.com/games/clients/y/potd_x.cab
o16 - dpf: {2b323cd9-50e3-11d3-9466-00a0c9700498} (yahoo! audio conferencing) - http://us.chat1.yimg.com/us.yimg.com/i/chat/applet/v45/yacscom.cab
o16 - dpf: {74d05d43-3236-11d4-bdcd-00c04f9a3b61} (housecall control) - http://a840.g.akamai.net/7/840/537/2004061001/housecall.trendmicro.com/housecall/xscan53.cab
o16 - dpf: {7d1e9c49-bd6a-11d3-87a8-009027a35d73} (yahoo! audio ui1) - http://chat.yahoo.com/cab/yacsui.cab


THE FOLLOWING ITEMS ARE NOT NEEDED TO LOAD
AT BOOTIME FOR THE SYSTEM TO WORK PROPERLY:

o4 - global startup: microsoft office.lnk = c:\program files\microsoft office\office\osa9.exe