Flash player causes IE7 to crash

I use Win XP Home with SP2 and IE7, on a 2 week old PC (so both were OEM loaded).
I have installed Flash Player in order to get a decent experience from websites.

On one site - and one site only - anything from 15 to 120 seconds after the home page has loaded, I get a message that "IE has encountered a problem and needs to close". By sending an error report to M/Soft and then getting the message box with a 'More Information' option, every time this says that it is Flash Player that has caused the crash.
I am directed to the Macromedia/Adobe site to update Falsh - but I already have the latest verison installed. My version in the Windows/System32/Macromedia/Flash directory is Flash9e.ocx.
Based on tips seen elsewhere, I have even added a copy of this in the same directory and renamed it as Flash.ocx.

Further more, I have uninstalled (using the Adobe/Macromedia special uninstaller) and then re-installed (every time downloading a new copy of Flash from Adobe and/or Macromedia) at least 6 times in the last 10 days, each installation being clean, with no programmes running and no anti-virus or anti-spyware software running at all.

This is driving me absoutely potty, as no-one can offer any help - not Adobe e-mail Technical Support, not MIcrosoft, not the PC supplier, not the wesbite where the problem is, no-one.
Yet it is a real problem but no-one is prepared to take ownership of it.

Has anyone in the communities got any ideas as to how to solve this?

Many thanks
bolehill

PS: Neither Flash nor IE7 were upgrade installations - they were installed as new.