Windows 7: Non functional IE9 and can't go to IE8

Hello,
I generally run the standard FF latest version. In previous thread I described how I damaged, corrupted my IE8 by trying out IE9 and then going back. They are non-functional. I tried FF 4 for a couple days and then uninstalled it. Sometime in that time I corrupted or messed up something as when clicking a link to a forum, it doesn't take me to FF and then pops up a script error. When just using FF 3.6.12 I have seen similar if not the same script error. Again can anyone discern what I did wrong and help me correct it please. Thanks for any replies.
glennc

Do a system restore prior to a point you messed up IE8, you should've done it in the first place. If that doesn't work, repair install may be your best choice.

Hello Gornot,
Thanks for your suggestions. I've not had good luck with System Restore Point, but I did find out from another thread of ridding yourself of IE9 and it reverts to IE8. Thanks again.
glennc

Try to run sfc /scannow in elevated Command Prompt. It may fix the corrupted IE8.

Also see this Tips for solving problems with Internet Explorer

Hello whs,
How ya been? I tried it again just now in case and it doesn't indicate any faults and the script errors come up still. Thanks for the idea.
glennc

Hi Glenn, I am fine, thanks for asking. Sometimes you have to run the System File Checker a few times to get all the buggers fixed. But maybe Jacee's link can help better.

Well Howdy Jaycee,
Howyadoin? Thank you for that trouble shooting link. I got all the way past disabling all add-on (Although on restart Silverlight and Shockwave reset themselves) and didn't delete them. I did a Reset without dumping my personal data and it has IE8 has come on with no script errors, so far. I enabled a few add-ons and it is still starting. Don't know what I should enable or disable. IE8 worked with the same add-ons before the IE9 change debacle.
1st why does MS Silverlight and shockwave flash object enable themselve even though I disabled them?
2nd is it safe to try to turn back on the all the add-ons again?
Thanks a bunch for getting IE8 seemingly running o.k.!!! I will await your reply before making any further changes.
glennc

My brain synapsyse remember certain members as being very friendly and helpful. You've always given your assistance as I found myself in times of trouble. Take care
glennc
BTW Thanks

Thanks for the kind words.