I just installed Windows 7 Professional, but I can't update my system. It just hangs. My Samsung SCX4521f printer can't update the drivers.
If Windows 7 can't install the drivers for this printer through the Windows Update, then I recommend to manually download and install each of the drivers (printer and scanner) from the following website. I've checked on Samsung Support and it appears there are drivers available for this device.
Note: Press on +See More on the download page to expand the list. Download the ones for Windows 7.