Recuva Does Not Launch

I have tried both the portable and the installable versions of Recuva, but all I get is it running in the Task Manager, but never launching on screen.

I am running Win7 64-bit with 8 GB of RAM.

Both versions do exactly the same thing - they show up in the Task Manager, but never launch.

I have to manually end the Recuva task in the Task Manager.

Is there a fix for this?

What security software do you run?

If you boot into safe mode does recuva run then?