Windows 7 Searching emulater for booting Linux *.iso systems inside Win7

Occasionally I got bootable *.iso images which contain a Linux system with some additional software.

Ok, I could burn these ISO images on a CD/DVD and boot from them in order to test the software.

But I could imagine that there is something like a Linux boot emulator (similar to QEMU under Linux) which
allow me to boot these ISOs from inside a running Windows 7 system

Is there somewhere such a ISO boot emulator available?

Keep in mind: I don't want a simple virtual drive tool for accessing the ISO content.
I want to really boot it (inside a separate window).

peter