Normally, one would use the OEM CD for a "new" installation on a new system.
You use the upgrade on a system with an older version of Windows already installed.
Windows OEM installation "defaults" to a different folder because it assumes that you do not want to install over the existing installed OS. You can manually change the folder to overwrite your existing OS.
When you install W98 onto a system with W95 on it, the install replaces only those files with the same name. It will notdelete any other file from the Windows folders.
Likewise, your existing registry will be modified, not replaced.
This is why most of us recommend a clean install of any OS upgrade. When you perform an upgrade with the old OS still present, you get all of the baggage that has built up on the system over time.
All the extra DLL files, and all of the registry bloat.
The advantage of the upgrade version is it's lower retail cost versus the full version.
The only dissadvantage of the upgrade version is on a clean install.
You have to "prove" that you have a copy of the older version. So it is an extra step.
When upgrading from 3.11 to 98, you have to cycle each 3.11 floppy through the drive!
One advantage of either the upgrade or the retail "full" version is that MS product support will be more willing to talk with you should you have a problem.
That said, I normally perform a clean install onto a freshly formatted hard drive wether using the OEM, or the upgrade.
Iuse the OEM version for new machines, and the upgrade for users who have a legal copy of 3.11 or 95 that they will no longer be using.
Chas
