Run Internet Explorer 7 (32-bit) in 'No Add-Ons' mode:

If you have Vista: Start > type Internet Explorer in the Start Search
box > click Internet Explorer (No Add-Ons)

If you have XP: Start > All Programs > Accessories > System Tools >
Internet Explorer (No Add-Ons)

Alternatively, you can create a shortcut on your desktop with the
following target path:

"C:\Program Files\Internet Explorer\iexplore.exe" -extoff

If no problems occur in 'No Add-Ons' mode, the problem is caused by one
of the add-ons that load together with Internet Explorer 7.

Problems with Internet Explorer can also be caused by the presence of
viruses or other malicious software.

---
Leonard Grey
Errare Humanum Est

Rajesh Fondekar wrote:
> IE7 32 bit hangs everytime I try to close the window, while I do not face the
> same issue with 64 bit IE. Is there anyway to make 64 IE into a default
> browser?