Standalone version tested. I too am user of 4.1.5.
Now it is requiring NT 6.2.xxx files. Windows 7 latest service pack is NT 6.1.xxx. Windows 6.2.xxx is Windows 8. New build of Electrum requires windows 8.
Now it requires phyton 39, which is not compatible with windows 7.
Is it really being required to use a new programming language tool? Or is it to keep the bits in fashion? I hate when they did that, for example, with MSN messenger. Or dropping the whole support for windows XP in microsoft compilers. New version of the compiler required windows 7 just to print "hello world". (BTW: This is side effect of centralized finance, this is absolutely undesirable in decentralized finance.)
edit: Windows6.1-KB2999226-x64 patch makes no effect, it is probably an issue with compiler build options, but not of electrum, but of phyton interpreter!
(I'm tired of soldering ASIC chips for this. I cannot afford new computers just for a bitcoin wallet or node. Can you afford new miners when just one solder joint fails?)