ActivePerl installs normally in C:\Perl

Yes, that's the default location, but the option to override that default and install some place else is also made available.

All the stuff should be gone if deleting this folder... and that is what he did

That's the great mystery. Perl-5.14, it's claimed, has been removed and replaced by perl-5.16 - yet the OP loads a perl.exe that needs perl514.dll. This just doesn't add up.
(The fact that the OP hasn't replied to this thread suggests to me that the problem has already been resolved.)

Update: Ooops ... seems she has responded, but provided no enlightenment.

Cheers,
Rob