Ok.. We run an in house application that uses an IE control to display a PDF in it before it gets processed.. When running it in Win7 32bit, it works perfectly. But when we run it in Win7 64bit it doesn't preview but pops up the "Open, Save, Cancel" like you would get if opening up an unreconized file extension in IE. I have tried the Reg edit for preview. We can't run Reader X due to our programs. My boss really needs to find an answer to this because we really want to upgrade to 64bit OS.. Any ideas would be great.