Hi Stan,
It depends if you're looking at it from a 'can you' actually do something vs 'what do the license terms' imply.
Will your MS Works products still function after installing MS Office upgrade, yes. In theory should they - probably not as
'upgrading' to an Office product suite would be moving on to something bigger (i.e. if you're on an airline and get a free upgrade
to first class, you're still on the same plane but couldn't sit in both coach and 1st class at the same time <g>). But, even within
the MS Office suite to MS Office suite upgrade, since MS Office upgrades also, intentionally, do not uninstall any prior app they
don't have a direct replacement for, so that you don't lose any functionallity, there are features in MS Works that aren't in MS
Office, so it's not uninstalled.
Is it likely that some 'software police' or the MS 'Genuine Advantage' checker will disable something for you? No, not likely

Based on the country/locale you're in there can also be laws that invalidate parts of the license terms restricting the use of the
product you have by installing a new product (upgrade or not).
As it's a MS license question and this is basically a peer support forum, for a specific answer you may want to also check with the
folks, by phone, through the links in
http://microsoft.com/licensing
==================
Thanks to the responders of my first ever posted question.
Unfortunately the responses gave conflicting information. Can either
the original responders or anyone else shed further light on this
question? >>
--
Bob Buckland ?

MS Office System Products MVP
*Courtesy is not expensive and can pay big dividends*