Password Screen Flashing on iTunes 12.7

This worked for me: I disconnected from the internet--on my computer, I unplugged the ethernet cable; launched iTunes; signed out of my iTunes account; quit iTunes; reconnected to the internet (plugged the ethernet cable back in); launched iTunes; and signed back into my iTunes account.

I have the same problem after downloading the latest update. I'm running Windows 7 Pro 64-bit. Tried a complete uninstall and reinstall of iTunes, but it did not fix the problem. I then tried disconnecting from the internet, which kind of worked and allowed me to log into iTunes, but as soon as I reconnected to the internet, I had the same problem. Seems to be some how related to the internet connection. FYI, I am using a wireless connection. Haven't tried using a wired connection.

I just encountered this problem, and stumbled upon the simplest solution of all. In Windows Explorer, right click on itunes.exe, (Program Files/iTunes/iTunes.exe) then in the Compatibility tab, select "Run as Administrator". If you don't know how to navigate there, you can right click on the icon and select the same, but may have to do it every time.

Thanks Sk8Dream. That worked. Strangely it didn’t quite work the first time, but after I closed iTunes in Task Manager and then clicked on the short cut to reopen it, the password screen no longer flashed. Good job.

This was helpful, I simplified the procedure and this worked for me:

Open Control Panel, select Programs and Features, then iTunes, click Repair

Launch iTunes and enter your credentials.

It may pop up the login again and say that your session expired, if so, go to Account, select Sign out, quit iTunes.

Launch iTunes again and enter your credentials.

I'm running Win 7 Home Premium, SP1 and iTunes 12.7.2.60. I believe the issue occurred after my email address had to be changed.

I have had this problem on and off with iTunes running Windows 7 Pro. The first thing I did was change my Apple ID password. The second thing I did was log on to my Apple account online and found that I had two instances of the "device" laptop I was having the flickering on. I clicked on one of the devices and both disappeared. When I logged back in from this same device and put in my new password, everything fixed itself. Now I only have one instance of the "device" in my account page and no flickering password sign-in. I am not exactly sure of the technical reason for my issue, but it could have been the multiple instances of the same device accessing Apple online which was causing the problem. Give it a shot.

Unfortunately, the repair option, which would make sense, does nothing to solve the issue - at least on my end. I did the disconnect from the internet option and it seems to be working fine for the time being. If you don't have easy access to ethernet cables and are on Windows 10 do the following without leaving your seat:

-Find the internet connection icon in your taskbar. If you're wired it looks like a computer monitor with a small cable on the left side of it. If you're wireless it'll be a wireless broadcast signal.

-Right-click and select Open Network & Internet Settings

-You'll see a few images showing your connection status and path of internet, look below all of that and click on "change adapter options"

-Right click on the adapter shown (Ethernet or wireless will be shown) and probably not many other icons, if any (tip: the active one, which you're going for, won't have an "X" over it and if you're wired you'll want to use the ethernet option, wireless connections need right-clicking on the wireless option)

-You should see the very first option on the drop down menu that says "disable" - select this to disable your network adapter and leave the window open so you can come back quickly

-Close out iTunes if it's not already closed

-Re-open iTunes with the network adapter disabled

-Wait a few seconds then return to the network adapter window you were using a moment ago

-Right-click the same adapter and now there should be an option to "enable", click that to re-engage the network adapter and restore internet connection to your computer

iTunes shouldn't prompt you to sign in again. If it does, enter your password. The glitch was the program not accepting your login and constantly flashing the sign in prompt over and over. Hopefully, you will no longer have that issue now and you can browse iTunes without issue.

If you still have the issue, my best advice then is to click "cancel" or the "X" button until the prompt goes away. It resurfaces every 20-30 minutes as best as I can tell if you go that route but the application seems to be fully functional since I'm technically signed in.

Thank you for this fix. I had the same problem and your directions helped me repair the problem and use iTunes successfully.

Worked for me!! Thanks for your help!! It’s been painful as!!