Hi staceykellykelly. Welcome to BC.
You don't say if you are using IE6 or IE7. I would be inclined to try removing the programs you are having trouble with via Control Panel>Add/Remove, and redownloading them again. When you try to remove IE, you may get an option to repair it, otherwise try here: http://www.microsoft.com/windows/products/...ie/default.mspx
As you are now using FireFox, download the IETab: https://addons.mozilla.org/en-US/firefox/addon/1419
Down in the bottom right of any FF window you will see a little FF icon. One click on that will change it to an IE icon so that you can use FireFox to download from MicroSoft.
Go to MyComputer>C:>Program Files, and delete any reference to QuickTime and Skype before you reinstall.
I would also run the Windows Live OneCare scan from here: http://onecare.live.com/site/en-nz/default.htm?s_cid=sah
. Only click on FULL SERVICE SCAN in the middle of the page and run a full scan. Let it fix anything it finds. This may take quite a while so be patient.
Good luck and let us know how you get on. Cheers