I don't know Electrum already knew about that announcement from Microsoft, but I think they will react to this news ASAP.
In the meantime, it is good for your fund by self-protect it with Windows upgrades to Windows 10.
React in what way exactly, stopping support for new versions of the Electrum on the W7? I think this is not a likely option, Electrum can still work without problem on W7, and that update you mention is there for years.
Any crypto wallet and that includes even hardware wallets can be compromised in some way, even on the safest operating system. Install Linux, download Electrum, verify the signature and then save seed to your email or any other inappropriate way and you are likely to be hacked. In most cases, it's not the problem of what you use, but the way you use it.
Microsoft still offers a free update for the W7/8 to W10, and I think this is the best way to update since a user can keep all files/programs. However, it is important that you read all the instructions and warnings before proceeding.
Download Windows 10