Cannot Re-Install iTunes on Windows 7 64bit

After a total of 13 hours on the phone with Apple Senior Techs, with no fix they could come up with and with them wanting me to send screenshots of my pc to their engineers, I messed around a bit with my pc and came upon this fix. Below is the very simple fix that I used to reinstall the latest version of iTunes AND have iTunes recognize my phone and iPad again. The steps are below.

1. Ensure there are no traces of Apple anywhere under Programs, installed on your pc, and make sure there are no visible remnants in your C Drive either.
2. Go to iTunes.com and install latest version. In my case it is for Windows 7 64 bit. 
3. You will likely receive the pop up stating "Errors Occurred During Installation" blah blah. Leave that window open and let it sit in the background!!!!
4. Go and open your Downloads folder where you will see iTunes 64 bit setup. 
5. Right click on the iTunes setup icon and click RUN AS ADMINISTRATOR.
6. It might take a while to run through the install but just wait patiently. 
7. When finished, close out all open tabs and notice the iTunes icon on your desktop. Do Not Open it, just verify it's there.
8. Restart your computer.
9. Open iTunes icon on desktop.
10. Once iTunes is open, you should see your Library. Plug your APPLE USB (do not use a generic USB) into computer and wait 10-20 seconds. Next, plug other end of USB into your phone. iTunes should now recognize your device, you should see the icon of your phone and all should be working well again. Good luck and if you have any questions, let me know.

Thank you very much for your response and thorough instructions as to what to attempt next. I have not run CHKDSK nor SFC/SCANNOW at any point, no. Initially, last weekend, Apple suggested I purchase a new computer because the new 12.9" iPad Pro has features that will not work with Windows 7 or the latest version of iTunes. With that said, the last Apple tech that was able to get iTunes running and recognizing my new iPad said that was nonsense. Yesterday, the concern was the iPhone not being recognized and the only option was was to uninstall and reinstall iTunes. I was again told that my computer was too old to recognize the iPhone 7 Plus with the latest version of iTunes. Mind you I'd been running every updated version of iTunes since I got the iPhone 7 in September with no problems. I was also able to run the iPad Air 2 with the current version of iTunes up until last weekend when I tried to get iTunes to recognize the new iPad Pro.

Anyway, the only concern with your instructions is the first part of Step #1 because iTunes has already been removed from my computer per the instructions provided through Apple, same as in the link you provided. Should I just go on to the next part of instructions? Thank you so much!

I'm glad to hear you were able to get your issue resolved. I only included all steps as I had initially started from Step 5 and it didn't work for me. Regardless, I'm glad all is working well for you now. My hope is that the steps I took will help someone else, whether they start at Step 1 or Step 5. All my best..

If you've already removed all traces of Apple programs, including deleting any Apple-related folders in C:\Programs and C:\Programs (x86) then pick up with the second part of step 1 in my earlier post to delete files in the "temp" folders.  This probably isn't really necessary, but it will not hurt and might help.

Step 2, running chkdsk, will check the file structure on your hard drive.  As I said earlier, cleaning everything out and reinstalling should have fixed the issue.  That it did not at least raises the possibility that there is some corruption in the file system.  Chkdsk should find and correct that if in fact any corruption exists.

Apple's iPad Pro specs say that it will work with a PC with Windows 7 or later and with iTunes 12.5 or later (https://www.apple.com/ipad-pro/specs/).  That's the same for an iPhone 7/7Plus (https://www.apple.com/iphone-7/specs/).   I don't have either an iPhone 7 or an iPad Pro, but I have an iPad Air 2 with iOS 10.3.1 (10.3.2 is the latest version) and it works just fine with iTunes 12.6.1.25 (current version) running on a Windows 7 Pro sp1 x64 system. 

If following the procedures in my earlier post don't help, I suggest that you ask for help in the Apple forums.  You often get better help there than from official Apple support: https://discussions.apple.com/community/itunes/itunes_for_windows

At any point in the process you described did you run CHKDSK or SFC /SCANNOW?

If any reason was given why you "needed a new computer" what was it?

I ask because although iTunes does sometimes become corrupted to the point where you have to completely uninstall it and then reinstall, it shouldn't happen multiple times in succession.

Here's what I would do in your situation.

1.  Completely uninstall iTunes following the directions here: https://discussions.apple.com/docs/DOC-6562#reinstall (don't reinstall just yet).  Then do the following:

• Click Start, type %temp% in the Search box, and press Enter
• Select All (CTRL+A) and press DELete.  Click SKIP for any files than won't delete
• Navigate to C:\Windows\Temp and again Select All (CTRL+A) and press DELete.  Click SKIP for any files than won't delete
• Empty the Recycle Bin again

2.  Close all open programs, then click Start, type cmd.exe in the Search box, then right-click on the link to cmd.exe and select "Run as administrator."  Respond as needed to the UAC prompt.  Type the following in the black Command Prompt window and press Enter

     chkdsk c: /f

Type Y to answer the question and then reboot your computer

Windows will check your disk after the restart.  It may take some time, depending on the size of the disk.

Assuming that you elected not to sit and watch as chkdsk did its work, you won't have seen its report.  Follow the directions here (use Option One, but skip steps 5 and 6) to see what happened:  https://www.sevenforums.com/tutorials/96938-check-disk-chkdsk-read-event-viewer-log.html

3.  Download and run this Microsoft automated tool:  https://support.microsoft.com/en-us/help/17588/fix-problems-that-block-programs-from-being-installed-or-removed

4.  Reinstall following the last 2 paragraphs of the directions from step 1 (https://discussions.apple.com/docs/DOC-6562#reinstall)

If the above doesn't work, please report at what point the problem happened and include the complete text of any error message.  Read through the document linked at steps 1 and 4 for additional suggestions, including what to do in the case of some specific error messages during the installation process.