Quest Toad hangs periodically on win xp

Hi folks

I am running Toad 7.5.2.0 on win xp. I find that while I am using it,
it periodically freezes my system. e.g. if I have 5 toad windows open
(schema browsers, sql editors), I work in 1 window, I then click on
another and work in that, I then click on another - at this point the
window comes to the front but my system freezes for 5 - 10 seconds. I
happens when switching between windows but not every time.

As you can imagine it is very frustrating.

Has anyone had similar issues and if so how can I fix this?

Thanks

Will