Hey Guys, Have just installed a stripped down version of XP SP1 on my new Core 2 Duo laptop. Can't get the 2 cores to work - there is no processors bit in the Device Manager (so 2 processors certainly aren't showing up there), and my computer has "Standard PC" underneath it, not ACPI. I know the dual core is working because i have a bloated version of XP Media Centre installed on a separate partition and that is all working as it should be. The question is: do i need to go through the whole slipstreaming process and reinstall XP, could i run autoupdate instead, or are there drivers i could install to get it working? How much a performance hit am i likely to take if i run auto update - will it put all the crap back in that nLite has (wonderfully!) removed? Also, i didn't install any network services with nLite, so it might be a bit of a hassle to run auto update. Does some one have a link to the necessary drivers to get SP1 working with multicore processors? FYI This is an Intel Core 2 Duo T5500 1.66Ghz on an Acer 5630 Laptop. Thanks in advance, Tom