If you need to install an earlier version of host driver, you cannot just reinstall the older version while the newer version is still in memory. If you do so, the older version of host driver does not overwrite the newer version, and mismatches can occur among the various software modules installed. See Mismatched Driver Error Messages.
If you will be installing an older version of host driver, you must completely uninstall all components of the newer version, and perform a fresh install of the older host driver software.