If you ran installer.bat, then that box should disappear after the installation has completed and you hit "Enter" .... but I don't really understand your post at all.

Open up a new instance of cmd.exe and enter perl -v.

If it doesn't print (in the cmd.exe window) some information about the build of perl, then the installation has not succeeded as I expected - and you need to tell us:
1) Precisely what did happen when you ran perl -v
2) The full name of the file that you downloaded from ActiveState
3) What steps you took in trying to install perl.

Note that you need to answer all three questions - not just one or two of them.

Cheers,
Rob