I've spent many recent weeks fighting with the 64 Bit Ultimate RC version .. Many problems with not able to install many of my Hardware Devices....A long list. The Damn thing wouldn't even work the Motherboard Built in Ethernet Controller . I have now installed a Retail version also 64 bit Ultimate & find that it' s (apparently) much better . Is retail (Version Dated Mid 2009) supposed to be significantly different from the RC ??? (\__/) (='.' This is Bunny. Copy and paste Bunny into your (")_(") signature to help him gain world domination.