If you click on 'settings' (I think, but try other menus), then on 'system info' or similar, it will give you a list of your hardware and system specs. Post that, it may help.
I'd actually suggest that to everyone. Download steam, (it's free) and use it for bug reports, as I said above. You can also get HL2:Lost coast and HL2:deathmatch for free if you have an ati or nvidia video card.
EDIT:I just realised that I didn't say where the menus were...
I mean the steam settings, not eufloria.