Nero executable error

Hello

I have begun recieving a error message, The Nero executable file has been modified! when opening
the program.

I have scanned for virus and trojan and drive is clean. uninstalled, reinstalled , using Nero clean tool,
still no cure. I disabled AV program during install.

O/S Windows Me
Nero 5.5.9.14

Thanks for any help.

Keb