RootKit, malware chase

Ok, so I seem to have a problem at work. My phone has Wifi, and I conect it to my work's network. Last week the phone got weird and applications stopped working. My wife (She has the same phone) even got a redirection on Opera.
Yesterday we had to re-install the web part of a multifunction printer because it was redirecting. So I came to the conclusion that we have a root kit. Why? because all computers should have McAfee up to date on them. I say Should, because maybe someone brought a computer from home.
Anyhow, I need to check the computers and I was wondering what do you guys recommend. I have scheduled AV scans in the network. But I cannot do check on all PCs with hijackThis. It will take me forever.
Any Suggestions??

I've been having good luck with malwarebytes.

Yes, but I need to run it in each machine. I have 40 here. It could be an endless chase.

Dehc, maybe you could put malware bytes (or Curio's Autoclean) app in the ClientApps folder in your domain, and edit the login_script.bat to do a scan on start-up... then once everything is installed/cleaned etc, just remove the apps/scripts ;)

Goodluck!

I was also going to find out if I could deploy it thru group policy, but since my last test failed (I tried to deploy MSN messenger, since we want to use it to get everyone more communicated).
I will look into your suggestion today.
I have scheduled to come tomorrow to the office to run the cleaning, so I can get it over with.

Old post, but any luck Dehc?