Get minecraftinstaller.msi from the link above. To protect the system, please check the file with the antivirus program. Use your own solution or try a free one – Dr.Web CureIt. Once you get 2.5 MB installation file, double-click on it and follow the steps to set up the program.
If you want to uninstall Minecraft, follow the steps: go to the Settings section, find the needed program, and remove by pressing on the Uninstall button.