As for hijack, I have yet to be able to get it to work.
Did you download from the link I provided ? What happens when you try to use it ?

Note on the download page :

CWShredder or HijackThis closes immediately after opening?

There is a variant of the Coolwebsearch trojan spreading that closes several anti-spyware apps when you try to open them.
If this is happening to you, download PepiMK's CoolWWWSearch.SmartKiller removal tool first and run it. After it does its job, CWShredder and HijackThis will run properly (as well Spybot S&D, Ad-aware and several anti-spyware forums).