Original sentence: Many 64-bit adopters roundly criticized Microsoft, because a direct upgrade from 32-bit Windows to 64-bit Vista is not allowed
Edited sentence: ) Because of this round-about way of installation, never truly upgrading the already installed OS and lack of expliciet instructions for the install procedure, many early adapters roundly critized Microsoft for this lack of forethought.Much criticisim has also be leveled on Windows Vista upgrade packages (such as the Windows Vista Ultimate upgarde edition) that include a 64-bit version of the OS.Windows will not allow a straight upgrade of the OS, but does not explain in the packaging how to install the 64-bit version in a machine with a currently installed 32-bit version (namly, buy booting from the 64-bit disc, by not inputing the COA number in the first phase, by chosing clean install, and then when the OS is fully installed, reinstalling the 64-bit version over the newly installed 64-bit version to "upgrade" the install, with the final COA and activation done at the end of the process