Reality Factory

"Windows cannot find C:/Program Files/Realityfactory.exe Make sure you typed the name correctly, and then try again.

My copy is installed in C:/Program Files/Reality Factory/Realityfactory.exe does that affect it?

If you're talking about previewing a level after you created it, it's usually not possible. You should preview it manually by launching RF.
Otherwise, if it's just that you can't open RF, check if you didn't move it to another folder after the installation, and see if it's still called RealityFactory.exe.

My copy is installed in C:/Program Files/Reality Factory/Realityfactory.exe does that affect it?

RF and its tools don't like spaces in any path ...

Yep, that solves the problem. Thanks.