Question about windows registry.??? Very important HELP SOS

I was looking how lock my homepage in Internet explorer 8 , And after search I can find it a solution , and the solutions is to create a new key on the windows registry , after do this " create the new key " I decide to delete the key I was created , so my question is !

 

Do you think

My windows registry is damage after do this modifications " and new key " this all I do on the registry nothing else.

 

I hope you can help me, Another thing I make reset settings on my IE8 , I dont this can help to leave default settings on the registry at windows .

 

Thank you so much