This vid contains tips that helps fix Cookies must be allowed problem when trying to run OneDrive/Skype, or register some Office program/suite.
Solution 1: (re-)enable Cookies in Internet properties -> rerun Onedrive. Solution 2: registry hack BACK UP, BACK UP and BACK UP! HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3\1A10 should be set to 0 (number 0)
If you're having trouble logging into Skype for Windows...
Repeat the Solution 1 above.
If you can't register your Office suite... Solution: set Internet Explorer as the default browser -> reset the Internet Explorer settings.