I think the next step is to back up your Itunes library. Can you back it up to an external drive?
Your media files should be in c:\Users\Eric\My Music\
Just copy the entire My Music folder over to your external drive.
If your music is not in that folder, you can find it. Start Itunes, go to Edit, Preferences and click Advanced. You will see the location of your media files in the Media folder location box.
Once you confirm you have copied the library over, you go to your Control Panel and Uninstall Itunes.
Download the Itunes installer from here
Make sure to confirm the program is installing into the C:\Program Fiies (x86)\itunes\ folder
After you reinstall it, you should immediately go and import your music files.
Start Itunes while holding down the shift key.
You should see the Choose Itunes Library box. Click on Choose Library.
Select the C:\users\Eric\My Music folder, or wherever you located your original library.
Itunes should open and your library should be restored.
For FireFox, there is this neat little program that will make a backup of your extensions, your favorites, and all the other important stuff for Firefox.
Download it here and install it. Close Firefox before running mozbackup, and make sure to leave all the default boxes checked. Make sure to note where you save the backup file.
Next, download the Firefox installer from here
Now when you go to the control panel to uninstall Firefox, make sure you do not have a check mark in the Remove my Firefox personal data box. and your data will be there when you reinstall.
When you reinstall, please confirm that you are installing into the C:\Program Files(x86)\Mozilla Firefox\ folder
Let me know how this all works out for you. Almost done!
Edited by Crowbar, 16 July 2012 - 07:58 PM.