Run regedit and go to:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32
Add a string named "wavemapper" and set it to "msacm32.drv"
When someone else with this problem mentioned they also had no sound for Flash stuff (as I did) I went searching for a solution to that and found this fix. Now I've got Flash sound again and, more importantly, I can actually play Darwinia again
