The reinstallation of Internet Explorer might solve several technical issues you're experiencing with the program.
If a technical issue has lead to the deletion of the Microsoft PDF printer, you're able to reinstall it from within Windows itself.
When attempting to (re)open a file, Windows states that the default program that has been selected cannot open this type of file.
The browser either freezes for long periods of time or crashes when attempting to play videos.
Change the default search engine for Cortana if you prefer to use Google instead of Bing.
A few quick steps to reinstalling the Mail and Calendar app within Windows 10.