can't open regedit

I was trying to change modify on something that was on a website. Remove ballon on taskbar. Here's the link: How to Stop Taskbar Balloons | eHow.com (http://www.ehow.com/how_8132543_stop-taskbar-balloons.html) The balloons are still there. Now I can't open the regedit. Nevermind I open it by going to search C:\Windows\system32, can you find *regedt32.exe but it won't open on start search. *