If I send you a hundred bucks will we get a free PC version? I'm completely serious!
A Windows Runtime, or a Windows IDE (complete port of SilverCreator to Windows)?
A Windows Runtime is fairly easy to do because every so often, I have brought the runtime code up to date to run on Windows. So it would only take me maybe 5 hours of work I think, to get a pretty good Windows Runtime. This would let you compile into Windows EXE games. If you donated $100 I would buy the REALbasic upgrade and make the runtime for free.
A Windows IDE (actual SilverCreator program) would be very difficult. The IDE is very deeply a Mac program, it is still using Resource Forks for example. I would not even attempt this until v2.0 was released and some bug fix releases came out too, so basically not until v2.1 - and then it would probably be the only main feature of v2.1 because of all the work involved!