I did a reset in Internet Explorer because it was freezing. That defaulted it to IE8 which throws Office 365 into Office Web App lite. Windows 10 & 11 will not install. I have removed .Net 4.5, reset IE again, checked for a KB update known to cause this problem, but it wasn't installed, ran SFC & performed a Windows Upgrade installation with a newer version of Windows 7 Pro. I've exhausted the Microsoft troubleshooting recommendations. What else can be done?