Ia€™ve been running builds of Win7 on my 1525 for some time after doing an in-place upgrade from Vista 32-bit to the Win7 Beta. We recently announced that we wona€™t support build to build upgrades from Win7 Beta to Win7 RC (which will be available to MSDN/TechNet subscribers tomorrow) I could either revert to Vista and do another upgrade or install from scratch. I decided to take the opportunity to move to 64-bit and since thata€™s not possible when doing an upgrade from 32-bit Vista I installed from scratch. Although all the hardware was successfully detected, this left me without some of the Dell utilities including things like the Wi-Fi sniffer and full scrolling support from the Trackpad driver.
Therea€™s a useful post on the TechNet forums about which drivers to use on a Dell Inspiron 1525 if you want to upgrade from 32-bit Vista to 64-bit Vista or Win7 and this helped get me up and running. It turns out that some of the 64-bit drivers arena€™t listed for the 1525 but address the same hardware on other Dell machines and so work just fine.