Can anyone offer any help with this problem?

I've had IE5.5 installed for months and over the last few days it's developed problems.

First, I could either maximize or minimize it, but nothing in between.

Next, I couldn't click onto some links - everything sorta freezes. The links where it always froze were the links provided in emails and links given in posts. i.e. I can go to most forums and click onto threads, but if there's a link given in the thread (or 'more' in smilies) - it freezes....(All I get is an empty frame)

I tried 'repair' (no luck).
Uninstalled/reinstalled (no luck, although at one stage I got a message saying something like 'Firefox' {whatever that is} couldn't be found).
Uninstalled 5.5 and installed IE6 (no luck).

TIA
John