I just got this running in hi-res mode on my laptop and every so often the C4 engine dies. Initially, during the install it asked me to install Direct X components from 2010. I read somewhere that installing the Direct X SDK install alleviated the issue. I installed that to get WOS1 working but now I get C4 engine failures and sometimes I get blue screens as well. Anyone else have any issues with 8.1 and WOS1? This is the latest version of WOS1, version 1.30 I believe.