My organization is upgrading our computers from NT 4.0 to 2000 Professional. Will the upgrade overwrite the registery file, and thus require all applications to be reinstalled? What about personal preferences/settings for the applications?
Yes it will. If you do a upgrade it will over write the OS, but should (by design) leave all data in tack. One word of advise. BACKUP ALL DATA first. Seen and have heard of to many horror stories when doing upgrade. I never do them, fresh install is the way to go. MY opinion.
I agree with the fresh install option. We migrated our desktops (about 150) to win2k a year ago using Ghost. I upgraded a few critical machines, and ran into some strange problems here and there. Most of those had to be wiped and have the OS reinstalled.
to answer you question - if you upgrade NT to 2k, it will (should) keep settings, data & installed apps (the new registry will be built from current). It will also leave profiles in the \winnt folder, rather than moving them to Documents and Settings (where they live in 2k).
while backup & clean install is definitely best way to go - this particular upgrade is more 'natural' than some (ie, 2k is just NT5, so basis of both is similar, unlike for example, win9x to 2k) - so probably won't cause too many problems (I've only done 3 or 4 such upgrades, and they were ok).
As has been noted - backup critical data whatever route you take.
PS. Is there a good reason to upgrade? Just curious, as find NT fine for office type situation - and less resource hungry than 2k (take it machine specs are ok for 2k)?
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