IE 8 back

IE10 is more secure than IE9.

IE11 made a nice improvement to security as detailed here:
IE11 Makes Over 40% Web More Secure While Sites Still Work

I'm using IE11 on one computer and IE10 on another. Only one website does not work for me using IE11 and that is because IE11 dropped a string from the user agent. I suspect that this is the cause of lots of issues that people are seeing. The websites will have to change. I don't see MS changing that user agent string back to the way it was.

I too use Chrome and an extension for certain websites. And I use Pale Moon 64 bit (Firefox) for forums and a few other things. The point is, use what you need to use - but you might consider keeping IE11 around for certain websites.

Why should all the websites have to change just because MS in their infinite wisdom decides to fiddle yet again. Firefox and chrome manage to update themselves without breaking functionality. All IE11 has done is cause users grief. Flash no longer recognised on many sites etc. users are sick and tired of so called 'updates'. Change for the sake of change. It's not always a good thing MS. Why not consolidate, what once worked was doing just fine until the horrific advent of IE10 and IE11. ......and don't get me started about windows 8 / 8.1 !

You are assuming that the websites are correct and that MS is wrong.

Try this scenario:
...websites parse the user string in non standard ways (W3 standards)
...MS warns for years not to do that
...MS forces the user agent issue with IE11

Internet Explorer 11?s Many User-Agent Strings - IEInternals - Site Home - MSDN Blogs

Ok maybe your right but the user string stuff means little to me and joe public. Whoever is right, the end scenario is IE11 brings many glitches in. Over on adobes flash forum there is carnage with the problems IE11 has brought. They should not of messed with so much code. To be honest IE10 and 11 should never in my own humble opinion been made available to windows 7. They prob work better in windows 8 which I will not touch as it is a kindergarten OS which no business or serious user would touch.

they finally fixed all the bugs on IE10 on June's patch Tuesday which made me want to install it, you just have to give Microsoft until February or March to fix all the bugs, IE9 worked just fine when it was released, there was no bugs in it, but it is now considered "outdated" now that IE10 and 11 have been released