A (Completely inexperienced

) friend of mine used my PC (and Internet Explorer

)for a couple of minutes to look at some recipes and voila! I come back and my PC is infected with a Zlob trojan and assorted spyware. I ran a scan with Windows Defender, which removed the trojan, but the adware/spyware is still on my PC. There is a new icon on my system tray which has 2 little animated icons flashing intermittently. One is a blue question mark and the other is a red x. Intermittent 'system notification' baloons pop up 'warning' me that my PC is unsafe and has spyware. This is actually the spyware masquerading as a genuine program.
Had a quick look in Task Manager, and tried to kill off wcs.exe and wcm.exe which are found in C:\Program Files\Applications\wcs.exe, but no luck - the processes restarted.
I think the spyware is messing around with my internet, and Internet Explorer has been hijacked - there are popups, my home page has changed, etc. Thank God I normally use Firefox!
I need help to get rid of this stuff. Greatly appreciated, thanks! First post on Bleeping Computer!!
(I can post my Hijack This log when asked for it)
Screenshot of infected Internet Explorer available below:
http://cid-dcbcd127aac52100.skydrive.live....reenShot015.png