Trying to sort out my grandfather's computer which he said has been acting slowly on the internet recently. Thought it was all fine at first but something isn't right with it.

When clickig links in Google/Bing most of the time it takes you to a random website with some advertising or iduplicate.us appears in the address bar then goes back to the search results. This is happening in IE and Chrome and it also has Firefox installed but that won't run at all.

So far I've run Spybot S&D and SuperAntiSpyware which found some stuff but hasn't fixed the problem.

Any ideas what else to look for or other software for removing crap?

A couple of things which I have disabled in the past, nothing new. I disabled all of the startup items yesterday just to be sure.

Running through a malware removal guide now and combofix.exe has found a .sys file patched with a rootkit. It's rebooting now so see if it helps.

I wish it was easier to switch between VGA and DVI on my monitor.

Oh, FFFF!

I just sorted out my grandfather's PC and now my dad just rang to say his computer isn't letting him do anything. I've just remote desktoped into it (surprised it let me change the settings to do that) and it has Win 7 Antispyware 2012 (it's from the future) blocking most things from running and being a total nuisance.

This is the second time I've had to sort out this for them now. The last one was XP Antispyware 2008 which did a very similar thing and was a total nightmare to sort out.

Grrrrrr!