iTunes for Windows 7 Home Premium

These are links to the last version that you can install:

• iTunes 12.10.11.2 for Windows (32-bit) - iTunesSetup.exe (2021-04-22) Last build to support Windows 7 & 8
• iTunes 12.10.11.2 for Windows (64-bit) - iTunes64Setup.exe (2021-04-22) Last build to support Windows 7 & 8

If your iPhone 7 is updated to iOS 16 then I don't think they will connect to it. Time to get Windows 10. See https://www.howtogeek.com/509087/how-to-upgrade-from-windows-7-to-windows-10-for-free/.

tt2

What version of iOS is your iPhone 7 running? Does it show up in iTunes when you connect it? See If you can't back up your iOS or iPadOS device to a computer or restore it from a backup - Apple Support.

See Archive iPhone backup in Windows - Apple Community for more on how new backups can be made, assuming iTunes is seeing the device.

Reset Sync History should ensure that at the next sync iTunes reevaluates sync selections when deciding what items need to be added to the device.

tt2

iOS 15 support was introduced in iTunes 12.12.0.6, so a Windows 7 compatible iTunes isn't going to be able to connect to your device. You can backup to iCloud. You could potentially sync music via iTunes Match or Apple Music. But it is really time you got yourself to Windows 10.

tt2

You could probably use some more RAM, but it should be capable of running Windows 10. See https://community.acer.com/en/discussion/369222/aspire-5742-windows-10-drivers for some success stories.

tt2