User accounts

I have an original account under users. I tried to install a program and an
error message popped up telling me it could not process the application and
it could not find the mandatory desktop service. It seems that the Computer
Administrator Files have been corrupted. I set up another account and it
works perfectly. I have 2 questions, first, if I delete the original account
will I lose any data or programs that are installed. Will I be able to access
all the installed programs and documents etc. from the new account.
thanks, Dekato