Thank you for your kind words. 
I don’t use IE. And if you have a desire to use IE, wait and update and install IE11.
You may use Google Chrome or Mozilla Firefox as default browser.
https://www.google.com/intl/en/chrome/browser/
http://www.mozilla.org/en-US/firefox/fx/
Related to the acceleration of the computer, my programs are cleaned temp files and cache files which eventually may slow down your computer. For this purpose, you can use the TFC by OldTimer:
http://www.geekstogo.com/forum/files/file/187-tfc-temp-file-cleaner-by-oldtimer/
As for the registry cleaner and “tune up” tools and simular like them, this is a pretense. Don’t use thouse …
There’s a lot of things well explained here, please read this blogs:
http://miekiemoes.blogspot.com/2008/02/registry-cleaners-and-system-tweaking_13.html
http://www.edbott.com/weblog/2005/04/why-i-dont-use-registry-cleaners/
I only use CCleaner ( aka CrapCleaner ) capable of cleaning temp and cache and superficial scanning registry.
http://www.piriform.com/ccleaner
How to speed up your PC? There is good and valid tutorial here:
http://www.techsupportforum.com/forums/f50/is-your-pc-running-slow-532075.html