I faced the same problem of trying to get Office 2000 to run on a new Windows 7 system. I succeeded (in the end) and I hope my experience may help others on this forum. So here goes:
1. I have a new Dell Vostro 270s with a quad core i5 CPU running vanilla Windows 7 Professional 64 bit. A trial version of Office 2010 was bundled with the Vostro (this turns out to be important).
2. I tried loading my Office 2000 Pro software onto the Vostro but found (as others have reported) that the base software will load and run, but the SR-1 patch via
o2ksr1a.exe won't load. This can be overcome by downloading the patch software as
O2KSR1aDL.EXE, extracting the files and running
setup.exe from the extracted file set. SR-1 should then load for you and run.
3. The next challenge is to apply the SR-2 and SR-3 upgrades
sp2upd.exe and
O2kSp3.exe. I couldn't get either of these to work, with error messages complaining that the SR-1 upgrade was not found. Aargh!! I tried this a couple of times and then gave up in disgust.
4. The next day I decided that I would give in to Microsoft and load a copy of Office 2007 that I had purchased several years ago at a big discount but never used because of the unnecessary (for me) additional features and menu changes. This turned into a nightmare when after getting a message confirming a 'Successful Installation' any attempt to run any of the Office apps generated an error message indicating that the installation was anything but "Successful". After this I found I couldn't uninstall the Office 2007 install because it was 'Corrupted"(!!!).
5. Now there is a
lot of published information about uninstall problems with Office 2007 and 2010 and various simple and more complex solutions, of which I tried several, but still had problems with installing Office 2007. In the end the only solution I found was to use the Fix It uninstaller that Microsoft kindly provide in
http://support.microsoft.com/kb/928218 and then to use Run > regedit to purge the Registry of the critical Office Keys. The Microsoft documentation gives a lead on this but I didn't take out some of the low level stuff. When I had done this I was able to load Office 2007 successfully, and, after repeating the process to get rid of Office 2007 and all the Keys it puts into the Registry I was able to successfully load Office 2000 and all the Service Releases. A result!!!
6. In summary, all these problems seem to be the result of Registry keys which are not properly removed by uninstalling late versions of Office and which prevent successful installation of earlier Office versions. My brand new PC came with an Office 2010 trial so I couldn't install Office 2007, and when eventually I did, it in turn prevented me from installing Office 2000! Maybe someone can trial and recommend a Registry Cleaner that does the job automatically but otherwise following the Microsoft manual Key removal process will get you there - but what a struggle!