Hi ,
I just did a bit more research and found that the software from the 411 site is a form of spyware.
My research lead me to download "Spybot - Search & Destroy" which found numerous other infections on my computer. This is a free program.
I ran this and cleaned up my computer and the difference is just remarkable.
My previous instructions did get rid of the contravirus (and unfortunately also installed additional sypware) but the computer was still running too slow for my liking. Hope this helps you.