I suspect that Vista is stopping all those things like ActiveX controls that Microsoft designed to make it easy for hackers to attack your machine
I thought from what I had heard/read that Vista had an XP compatibility option - that might work, otherwise check for Cookies being permitted.
I will not buy a new PC unless I can get XP - my daughter is just buying one from Dell which comes with XP loaded and a Vista upgrade disc. I don't think the Vista disc will get used
This is via the business site - not sure if its available to mere customers.
BTW, if you forget your Vista password I have the disc that will reset it! Tried and tested.
Barrie