The Inspiron 6400 supports a 32 Bit only architecture unless it has a T7200, T7400 or T7600 processor. However even with these processors the chipset allows a maximum of 3.24 GB of RAM so there is little point in putting 64 Bit Windows on it. I had Windows 7 and Windows 8.1 and Windows 10 Insider Preview running on one of them a long time ago... Media Direct kind of worked with Windows 10 (if installed correctly) however I did not try it after a build upgrade. I think some people have experienced minor issues with such old wireless cards on Windows 10 Version 1709 and Windows 10 Version 1803. Disabling the (hidden) Microsoft Wi-Fi Direct Virtual Adapters in the Device Mangers has helped in some cases.
HI, I'm attempting to upgrade from Vista to Windows 7.  The only thing left to do is create enough disk space for the procedure.  I've still got a few gig to go. Is it possible to move some of the available disk space on the D:drive to the C:drive ? Also, I have an expansion drive with 450 GB .  Can I utilise that in some way ? Cheers, David
upgrading from vista to windows 7