The installation starts, I see all sort of GUI widget displayed ...
That's just the tests running.
Failed 2/75 test programs. 2/4584 subtests failed.
No such problem for me on Windows 7, Strawberry 5.26.0.
What version of Windows are you running, and what does
perl -v output for you ?
I think you could go ahead and install the module, anyway. Just force the installation (
cpan -fi Tk ) or cd to the directory in which Tk was built and run
gmake install
It would, of course, be good to also get some understanding of what's going wrong here. I couldn't quickly spot any bug reports at
https://rt.cpan.org/Public/Dist/Display.html?Name=Tk that seemed relevant to the 2 failures you're seeing.
Cheers,
Rob