Just a quick note on how to remove IE11 from Windows. IE 11 is good but you occasionally may need older version for testing purposes. Issuing the following command will remove it and you should have IE10 as a result (restart is required):
wusa.exe /uninstall /kb:2841134
Unfortunately this doesn’t work for Windows Server 2012 R2 where IE 11 is built in/baseline browser (it looks like there is no way you can went back to older IE version there). So this should work on: Windows Vista, Windows Server 2008, Windows 7, Windows Server 2008 R2, Windows 8, Windows Server 2012.