Originally posted by: tcsenter
I responded that is still not a clean install that he was changing what clean install meant to what he wanted it to mean and I said MS had made a stupid mistake by changing the way upgrade software worked.
Clean install has never meant on a clean (to mean blank or empty) hard drive. Clean install has always meant a new installation that overwrites, replaces, or deletes all existing code (and user data) or newly writes the code to an empty disk, rather than an upgrade which retains existing installed code and user data.
e.g. If I have a current Windows XP installation that gets fubar'd, and I want to re-install Windows, I have two choices:
1. Perform an in-place upgrade (reinstallation) that will retain most of my registry, all of my applications and user data (if all goes right). This can be performed by booting to SETUP with the Windows XP disc, selecting "Setup Windows Now" by pressing Enter (instead of Repair), press F8 to accept the EULA, make sure the current (broken) installation of Windows is highlighted, then press "R" to Repair that installed copy of Windows XP. This will overwrite only select portions of the registry, and will in most cases retain per-user registry entries, preserve my applications, user data, and even user profiles.
2. Perform a clean or fresh install that will overwrite everything, losing all applications, registry entries, user data, and user profiles, whether there is already an OS installed or the drive is blank (doesn't matter, they're both a clean install). This can be performed by booting to SETUP with the Windows XP disc, selecting "Setup Windows Now" by pressing Enter (instead of Repair), press F8 to accept the EULA, then following the instructions to install a FRESH copy of Windows that will completely overwrite the existing installation. I need NOT format the drive or repartition it. SETUP will give me the option of formatting the drive or use the current file system.
A clean install is commonly peformed on a newly formatted (or unformatted) hard drive that contains no prior OS or user data, but it does
not implicitly or explicitly mean a blank or newly formatted hard drive that contains no data.
It means that the resulting installation will neither preserve nor contain any remnants of the current installation (if one exists) and lays down an entirely new registry, system files, directory structure, and all that. The installation will be "clean" of all the prior install's problems and dirt, an upgrade will not. Windows XP SETUP will always use the 'Quick Format' method by default when installing using Method #2 unless the 'Full Format' is selected.
this sucks for anyone getting new hardware and installing Vista. I alone can think of two people who have older systems and legal, full versions of Windows XP.
Why? The retail upgrade of Vista (and XP) costs more than the OEM full product. When those people go to buy newer hardware, they can purchase the OEM/DSP version of Vista and do a clean install (for less).
Previously, people could have bought a retail or OEM copy of Windows 98, then buy an upgrade to, say Windows XP. When they bought a second computer, and wanted to stay (generally) on the side of the law, they could go and buy an upgrade version of Windows XP and use the original Windows 98 CD to install XP.
Which is not legal and would violate MS licensing terms on the second and subsequent computers. Ergo, Microsoft took a step to reduce one common method of piracy (getting the upgrade discount but not owning a qualifying FULL product for the PC.
I don't understand why anyone would purchase the upgrade version, anyway. It actually costs more than the full OEM version.