As mentioned elsewhere, git for Windows includes its own Perl. This seems to interfere with your Strawberry Perl.

AFAIR the git installation asks how to handle the PATH, my choice is usually the most cautious one, and I call Strawberry Perl usually via the portableshell.bat to avoid this situation.

Update: You probably checked "Use Git and optional Unix tools from the Command Prompt", my choice is usually "Git from the command line and 3rd-party software", or (seldom) "from Git Bash only".

I don't know, however, whether it is sufficient to remove something from the system PATH, or you'd need to un- and reinstall git to change this setting.