I was looking for a way to get viewcvs going for our CVS for NT installation.
I tried installing Python for Windows and using that, but it seems that viewcvs and python for windows don't get along. After that, I gave Cygwin a go.
I could get Apache up and going with a little modification to the httpd.conf, but viewcvs just kept barfing on me about

 "unable to remap C:\cygwin\bin\cygssl-0.9.7.dll" 

on every request. I then found out that to fix this, I should do a

 rebaseall 

from a fresh cygwin window with no other cygwin processes running. After this all went well
I'm now checking out ViewCVS for Windows for a native solution.
Fingers crossed. Update: That worked fine once I upgraded to a later version of CVS for NT.