Cant install norton after changing my drive letter

i had norton internet security 2011 in drive F:, i changed that drive letter to "D:",

 

then when i restarted the computer Norton didnt auto start anymore..and now if i try to reinstall it I get the yellow install circle but then it says norton has stopped responding..ive tried manually deleting the folder in program files but it doesnt work.

 

HELP PLEASE!!

 

my OS is windows 7