hi @Piotr_Adamowicz
No need to file a bug as it’s not one indeed 
Announced ? i guess it has been… shyfully:
https://developer.blender.org/T85596
Look at Barton note.
From my humble point of view, i’m unable to understand why win7 is abandoned.
It’s a 64 bits app offering all the needed functionnalities. Even NVidia or AMD still support it ( even if $$$Gates$$$ dont anymore ).
MS-DOS ? okay. Win95 okay.Win2K okay. WinXP okay… There are all non discussable lacks on those OSes for making blender run.
But win7 ??? There’s ABSOLUTELY NO REASON !
And don’t tell me it would burden the install file or the devs work !
Those kind of libs are just few Kilobytes of approved and improved code since now decades. And for devs it’s noting but a checkbox to tick saying ‘include win7 compat’ before running the compilation.
Dramatic much ? is what you say. indeed it is for me 
In my whole family we are at least 12 running win7 ( Okay i confessed that for some i installed a non messy ( win7 ) OS for some ease-of-use reason )
I’m not sure all people use now win10… maybe it would be interresting to make a poll on this ^^
At last but no least the missing dll do not integrate properly in win7 and leads to a crash.
If the abandon of win7 were motivated by a need of new great features with no bugs and fluent use of million faces meshes i could understand it and would think about migrating to win10. but i guess that most of the major features ( the ones bugged that fuck-up your bakes or renders or fluent workflow ) will still be there ( like they are since now 3+ years ).
so my interrest to waste money on W10 for blender is 0 except if i consider that praying for potential bug resolution in future releases would justify that i was forced to buy win10. This is nothing but speculation. Just like a bet and i hate to bet ^^
I’m one of those ( old old-days morons ) who think that ‘better’ is worse than perfect.
This is not the way of all people… and i won’t discuss here why i know they are wrong
as this is some kind of phylosophical discussion wich have no place here.
Summing-up the situation i’d simply say it’s really early for throwing away win7 platform for blender.
This is my opi and the reason for this post. And am glad some ppl give their opi too 
Happy blending !