Hi, Attempting to Slipstream SP1 and installed 1.70. Tried many times and could not find the option to install SP1 (I have used previous versions of this so know what I am looking for). Installed the previous build of 1.60 and straight away the tickbox appears. Is this a deliberate thing or just a bug? did notice when I dl 1.60 it has SP1 written in the file name. Host system: Windows 7 x64 SP1 Trying to Slip stream x64 Thanks