OT: Explorer (11) upgrade problems with windows 7

Be warned before you download and install the m/s explorer 11 update that it does not work on my computer.
Fortunately my main browser is Firefox 25, which seems to be working well, except for some explorer [11] specific features which some site designers insist on using (such as correctly displaying the <complete purchase> button). [Thought -- did healthcare.gov test for compatibility with older versions of explorer and other browsers such as Opera and Firefox?]
my system: O/S windows 7 home premium machine Acer Aspire laptop 5552-3452 AMD dual core 4 gb mem
Explorer 11 downloaded and installed c. 3PM 07Nov13 Latest m/s system patches downloaded and installed before Explorer upgrade.
Let the group know how your upgrade goes/went.

back to v.10
On Thu, 07 Nov 2013 19:07:12 -0600, F. George McDuffee
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=========================FWIW- Recovery procedure on my laptop.
To return to your previous version of explorer undo the update to version 11 following the directions on the following site http://www.lifehacker.com.au/2013/09/getting-rid-of-internet-explorer-11-in-windows-7-8-and-8-1/
You can download the M/S upgrade directly from the M/S website (c. 56 mb) and then try to reinstall. There are versions for both 32 and 64 bit versions of win7 so be sure to get the right one. http://www.microsoft.com/en-us/download/details.aspx?id@901&WT.mc_id=rss_alldownloads_devresources
When I uninstalled the v.11 update, my old v.10 came back and seems to run OK. As it ain't broke, I ain't gonna fix it...