Windows 7 was released in 2009.

Windows 7 Updated v5 → updated windows 7 by K4sum1
Se7en L1te → built on top of Windows 7 Updated v4 (2020-01 base), highly optimized, x64 only, around 6 GB

For stable needs, Firefox ESR 115 is the official latest supported version.
https://github.com/Eclipse-Community/r3dfox also exists for a newer version, however the ESR is generally enough.

Best choice is probably MAS since EZWind whatever doesn’t work with UEFI.

To deploy Office 365 on windows 7 with Office Tool Plus:

1. Copy and extract Office C2R v2002-12527.22286
2. Select Implementation, Installation files → choose sources
3. Add languages and required products (Excel, Powerpoint, Word)
4. IMPORTANT: For installation module, choose Office Tool Plus. Regular office deployment tool will exit with kernel32 error on windows 7.

Install codec pack for playing videos in powerpoint presentation

See https://blog.lightwo.net/steam-client-downgrades-survival-kit.html for how to use steam past its expiration date.
Take note that some games don't work on windows 7. You can try the extended kernel: https://github.com/i486/VxKex works for some games, make sure to spoof win version.

Disable the Search process for better performance.

See https://forum.mattkc.com/viewtopic.php?t=188 for a promising guide on how to do this.

for virtualbox, use vboxmanage setextradata "win7" "VBoxInternal/Devices/vga/0/Config/VMSVGA10" "0" to fix 3d accel bugs

VMware Workstation is good for having Windows 7 hosts under Linux. Some kind of 3D hardware acceleration is supported, mostly use it for Office, sometimes it's a bit buggy though.

To test hardware acceleration under Office I usually go through the dreaded “Terorism.pptx”. It features a lot of 3D effects and transitions, including an embedded video that can't be played without some form of 3D acceleration. A VM that passess this presentation without problems is usually okay for 3D and network (youtube videos).

If the network doesn't work after an update, try restarting.