Hi PolloTime,

Thank you for posting in Microsoft Community!

I understand that you want to set all web sites pages to display in Internet explorer 10 compatibility view.

1.      Are you using desktop or modern UI Internet explorer?

Method 1:

I would suggest you to click on Internet explorer in the desktop, and

a)      Click ALT key and click on tools,

b)      Click on compatibility view setting.

c)      And clicks check the box; display all the websites in compatibility view

Method 2:

I would also suggest you to refer the link and check.

Manage add-ons in Internet Explorer

http://windows.microsoft.com/en-US/internet-explorer/manage-add-ons#ie=ie-10

Method 3:

If issue persists try resetting Internet Explorer's settings and check. Follow the steps:

 a. Press Windows logo key + R.

b. Type inetcpl.cpl in Run Window and press enter.

 c. Click the Advanced tab.

 d. Click Reset and click apply and ok.

 Note: The Reset Internet Explorer Settings feature might reset security settings or privacy settings that you added to the list of Trusted Sites. The Reset Internet Explorer Settings feature might also reset parental control settings. We recommend that you note these sites before you use the Reset Internet Explorer Settings feature.