I became aware that there are leftovers, presumably in the registry.
When I click on the exe file of a recently installed program, a Windows Installer window opens up saying
The feature you are trying to use is on a CD-ROM or other removable disk that is not available.
Insert the 'NI Data Socket 5.0'disk and click OK.
Using XP's Search for National Instruments reveals nothing. However, if I run JV16 Power Tools' Software Uninstaller, it coughs up well over 100 entires, whose Author is National Instruments, in the "Installed software without uninstall info" section of the results.
If JV16 can see them there must surely be a way for me to see them too?
How can I locate these entries and delete them?
I shall attach a text file listing the entries.