-snip-
After downloading the 3 wallets of Windows, the same prompt as above appears. How can I solve the upgrade problem.
All three versions (
Stand-alone, Installer and Portable binaries) are built from the same source, so you won't get much difference when it comes with compatibility.
Try to install all of the available windows update for your "
Old Version of Windows" (
Windows7?).
-snip- my old versions of Windows have installed the KB2999226 Windows update.
See if you have both 64bit (
x64) and 32 bit (
x86) versions, but not if your Windows is 32-bit.
Links for Windows7:
If nothing works, use version 3.3.8 that should work in Windows7 until you've upgraded to Windows10/11.
Old version download link:
https://download.electrum.org/3.3.8/- electrum-3.3.8-setup.exe - Installer
- electrum-3.3.8.exe - Stand-alone
- electrum-3.3.8-portable.exe - Portable