I wouldn't bother fixing Internet Explorer 7. I would up date to version 9. It's the most current version for the operating system Vista. Here is a link that might be useful: explorer/ie-9

If you are using Windows 7, then you should be using IE9 and not an earlier version. IE8 is vulnerable to various problems. Do you have any other browser besides Internet Explorer installed? I would suggest that you always have at least two browsers available to use in case there is a problem with one. You might try Firefox or Chrome or Opera, all of which are probably better browsers than IE. It is doubtful that IE is the cause of your problems with Facebook.

The attraction of IE alternatives, especially 5 years ago and more, stemmed more from how clunky IE was rather than the superiority of the others. Firefox/Netscape/Opera were ok and worked fine, IE was awful. The decision for what best to use was easy, though much of Corporate America stuck to IE for employees' internal use. Today, I think IE has done a lot of catching up. I find it pretty decent and comparable to the others though I don't use it as my default browser. OP, there are a half dozen or more solid browsers to choose from, all have there own peculiarities, problems and features and all are free. There's no need to persist with something that isn't working for you.

I finally figured it out. If others have this problem, got to Control Panel > Programs and Features > For Win7 in left hand panel click "view installed updates > scroll down to Microsoft Windows, then find whatever it is you want to install. If the install was very recent, it is easier to change the view by clicking on Installed On tab, then all will be arranged by the date it was installed, bringing the recently installed to the top. Then just hit uninstall.