So I\'ve created an offline installed of VS 2017 Community on my laptop using this command:
vs_community.exe --layout \"D:\\Downloads\\VS
I have the same issue after uninstalling SSDT for Visual studio 2017, Can't remove and reinstall or update visual studio 2017. I just restart my machine and it's OK. my be you have also to log in as an administrator ( it depends on your machine configuration and what you can do with you current account)