Error code #429 & Microsoft Security Update KB911562
Myst, Downloading and installing Microsoft security update KB911562 (deals with Data Access Components v2.8) caused Error code #429 & loss of data updates. The fix mentioned above, to correct the registry, does not seem to resolve it.
There is no way to uninstall the security update so my eventual solution was to recreate the system from a backup and avoid installing the KB911562 update (WIN98se). XDEV is working fine at this point.
Here is a detailed description from MS regarding the KB911562 security update:
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