> I am considering an upgrade to Vista because I have encountered a virus
> called ZLOB.TROJAN.
That's probably the worst, and certainly the least useful, reason to
perform an in-place upgrade that I can think of. Make sure you've
completely eradicated all traces of this Trojan *before* upgrading the
OS. Failure to do so is likely to only more deeply embed the infestation.
>This parasite exists in the registry and I have been
> unsuccessful in removing. My question is: Will upgrading to Vista replace the
> XP registry entries?
Not exactly. While Vista's installation process differs greatly from
those of earlier Windows versions, the upgrade process is specifically
designed to retain as many of the current registry settings (along with
installed applications) as is technically possible. otherwise, there
wouldn't be much point in there beiong an upgrade option, would there?
Those registry entries that are compatible with Vista (almost all) will
be recreated in the upgraded installation.
> Also will I be able to use the less expensive upgrade when I currently an
> OEM version of XP that came with my Dell computer?
Yes, you'd qualify for an Upgrade license to any of the Vista editions.
When upgrading, the license type (OEM Vs. retail) of the older,
qualifying OS doesn't matter.
Just remember to completely eradicate that Trojan before proceeding.
Also - and this is very important, make sure that you computer meets or
(preferably) exceeds all of Vista's system requirements and that Dell
has provided Vista-specific device drivers for all of the computer's
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