try this
https://www.microsoft.com/en-us/download/details.aspx?id=30135
you can also search the web for other troubleshooting suggestions
or for
further troubleshooting steps will have to come from support
another idea is to uninstall 4.8. reboot. disable virus software temporarily. try to reinstall TT 2019
then you can upgrade to 4.8. don't remove 4.5.2.
