Internet Explorer 7 - An Excellent Upgrade from IE 6
I had been actively using the beta versions of IE 7 on all my home and work PCs, and was pleased especially with the more secure implementation. Think of a browser as being a compiler of objects at a web-site and how it has to protect us from a "sea of malware" out there.
Moving to IE 7 represents a positive step for improving home or corporate security. From a corporate standpoint, it's important to test, pilot, and certify this with all your apps before rolling it out.
IE 7 - Recommended installation approach
* Use only the official download from Microsoft's site
* Reboot PC for fresh start (e.g., advanced users should take a system restore point)
* Shut down all started applications and Disable AV scanner
* Do not run anything else during the complete install process
* Wait patiently as some processes are long-running and might seem to hang, (overall this required about 5 to 10 minutes for me).
* Reboot as prompted (twice)
* Select the "run" to continue the process after 1st reboot.
* Keep lucky charms and a celebration kit handy, e.g., plenty of Mountain Dew 
Internet Explorer Home Page
http://www.microsoft.com/windows/ie
Install the latest build of Internet Explorer 7
http://www.microsoft.com/windows/ie/downloads/default.mspx
Prepare your organization using the Internet Explorer 7 Readiness Toolkit
http://go.microsoft.com/fwlink/?linkid=64421
If needed, install the Internet Explorer 7 Blocker Toolkit to block automatic delivery
http://go.microsoft.com/fwlink/?linkid=65788
Another excellent resource for tips and techniques 
http://aumha.net/viewtopic.php?t=22165