The solution NI gives for this persistent error may help some, but for many it does not help.
This workaround helped me:
Start windows in safe mode with network enabled. start Native acces. Update the programs you want to be updated. Ignore the error message ('installation failed. The previous installation can not be removed'). Start windows in normal mode. Go to the download directory and find the zip files of the downloaded updates. These can be opened and the update executables can be started.
a bit more hassle, but it works.