IE: can't type in username or password fields

[Argo]

Here's one for my fellow geeks.
 My mother has once again presented me with a perplexing problem. Only when using IE, you can't type into any username or password fields so you can't login to anywhere.
After her last colossal problem, IE would immediatly close including all explorer windows, I reinstalled Adaware and Spybot then installed AVG antivirus and trojon killer. After checking all the internet and IE settings, I ran Adaware and Spybot. Which hadn't been run since the last problem 48 days ago. That found abit of stuff and removed it. Nope still had the problem. Tried CCleaner, still it persists.
I'm assuming that it is some malware/virus that is attacking IE. Nothing odd in the process list. I'm thinking of trying to reinstall IE.
Anyone else runing to anything like this?

[Argo]

For that matter she could use Netscape/Mozilla or Opera. Only then she couldn't play her little web based games that need ActiveX. Which is where I think most of these problems come from.

[Argo]

@ LinchpiN

She cannot type in the fields or they dont accept what she types?

Cannot type in the fields. Move the pointer over a username, password, or email field and the pointer changes but there is not text cursor so you can't type.