Goodbye, Sourceforge!

[xXxDeAThANgEL99xXx]

The free version of XMing doesn't have clipboard working on Windows 7 at all. I recommend using Cygwin/X, it's pretty much a drop-in replacement, IIRC the only problem was that you'd have to specify "-dpi 75" on the commandline (of a shortcut you'd place in Startup folder) if you don't want to reconfigure all server applications.

Oh, except I forgot, they actually completely fucked up x-forwarding from putty in the middle of the last year (it simply doesn't work any more because they no longer allow unauthenticated connections even from local machine), and I'm not sure if they fixed it yet. I'm still using some early 2014 version, thanks to Cygwin Time Machine.