iTunes won't uninstall/reinstall and says the software is not installed to read my iPod.

First, thank you for replying so quickly, your help got me a little further this time! I tried removing the items one by one in the control panel and using the regedit for the .msi things. I deleted those folders and then went back to the control panel to uninstall everything else. After doing this, it would not let me uninstall the things named "iTunes, Apple Application Support (32 bit), Apple Application Support (64 Bit), or Apple Mobile Device Support." It told me that "This action is only valid for products that are currently installed." I tried restarting my computer and installing iTunes again, which actually ran all the way through and acted like it finished installing ok. However, when I connected my iPod it once again told me that the correct device software was not installed and to try running the installer again. Anything else I can try? I really appreciate your help, thanks again.

Also, when I found the folders for (eg) C:\Program Files\iTunes but it wouldn't but I only found them for iTunes and iPod and it wouldn't let me delete them, it said "This action can't be completed because the folder or a file in it is open in another program."

Ok, I got a little further this time, but now I'm back to where I started. I ran the Fixit and it took care of everything except for Apple Application Support (32 Bit), at least I think it took care of everything else, it said there was still a problem with everything I tried to uninstall but when I went back to the Control Panel the items were no longer under the uninstall list. I then tried to reinstall iTunes, which went smoothly, except for the very end where it told me that "Apple Mobile Device Service failed to start. Verify that you have sufficient privileges to start system services." I thought that may have had to do with the "Change user account control settings" section so i set it to "never notify me." and uninstalled iTunes again and restarted my computer. I then tried to reinstall iTunes again but got the same "Apple Mobile Device Support failed to start. Verify that you have sufficient privileges to start system services" message as before. Any suggestions? Thank you so much for your help!

Ok, I think I'm down to trying the 7zip for the "Apple Mobile Device Services" but I haven't tried it yet because I don't really understand how to do it. I tried starting the AMDS but it gave me an "error 2: the system cannot find the file specified" message. Any specific instructions for the 7zip that you know are correct? I googled it but I don't want to try it until I know for sure how to do it. Thank you for sticking with me on this.

So close (I hope!) The 7-zip worked fine (definitely easier than I was expecting) but when I tried to install the Mobile Device Support I once again got the "The system administrator has set policies to prevent this installation" message and it won't allow me to install, what do I do? I am so sorry this is taking so long, you've helped me so much.

In regedit, I found the Computer\HKEY_CLASSES_ROOT\.msi but the .msi folder doesn't open any further than that (as far as the package\shell part goes.) What does that mean?

Since the folders would only open as far as the .msi part, I thought that might have been far enough, so I tried finishing everything like the article said, but when I right-clicked the Apple Mobile Device Support folder the "run as administrator" option still wasn't available. It did let me make the runas key, but since the folder didn't open any further than the .msi part anyway I don't know what good it did. Also, I just realized that article was for Windows 10, but my computer's back on Windows 7 at the moment (I thought iTunes just didn't like the upgrade so I switched it back to 7, that's when nothing would uninstall and I originally posted this question.) Could that be why I'm having this much trouble? I can switch it back if these changes for sure work on Windows 10. Thank you for sticking with this.