Bareword "BLOCK" not allowed

"BLOCK" is defined in Archive::Tar::Constant. Which version of Archive::Tar do you have ? Perhaps you have an ancient version that fails to define "BLOCK". (Archive::Tar-1.30 seems to work quite well with Archive::Tar::Streamed-0.03 for me ... though I suspect you'll have trouble updating Archive:Tar on your broken perl.)

If you're wanting to do much useful stuff with perl on Windows you ought to consider getting an up-to-date version of Win32 perl (one that ships with its own compiler and make utility). I recommend Strawberry Perl (http://vanillaperl.com/) - which comes with the MinGW (gcc)compiler and dmake. You can then also install the version of ppm that is found on CPAN, and use it to 'ppm install' from the usual repositories whenever you want.

Cheers,
Rob
Update: Actually, you can probably get a sufficiently recent version of Archive::Tar using ppm:

ppm install http://theoryx5.uwinnipeg.ca/ppmpackages/Archive-Tar.ppd
[download]

That will install version 1.26.