Welcome to Seven Forums rdb. The easy answer would be to remove the updates for IE from February and see if that corrects it. You can then install one, and test. If you install both again, and the problem does not return, you are good to go. If one or the other installs ok , you can leave it. You could then hide the other, but obviously it was released for a reason
You could do a search on the one that causes the issue, and see if there are others experiencing the same thing. Start
> In search box type Windows Update
> In the left pane, click View update history
You should find the same 2 IE updates as I have KB2797052
. At top or Windows update page click on To remove an update see Installed Updates
The installed updates page will open, paste the KB numbers from above into the search box upper right. The update will display. Click on it, a popup will appear asking you if you want to uninstall it, choose yes. Remove one, then test. If still slow, remove the other and test again.
You could then go to Windows Update and reinstall the update that didn't affect the speed again. I would update both again, as they may work the 2nd time. If not, uninstall the offending one again. Obviously this isn't the best fix, as the security update is something you want, but if the update itself is the cause, the choice is to keep it and deal with the speed. Post back if the updates are not the cause.