Sorry to hear you are still having problems.
Have you tried a plain KVM install or VB or other virtulizer. That
would rule out whether it's something with win4linpro or some possible
system issue.
I have a plain vanilla install of KVM for playing with before I try it
in my experimental install of win4lin and if it doesn't break anything
there then I commit it to my working install. Sounds rather lengthy
but it has saved me some major grief.