I use Windows 7.
If you are using core for development, i guess that's fine.
But if you intend to store money on your PC, please don't use Win 7 anymore. It is outdated, vulnerable and won't get any security updates.
It is not just missing lots of security features which are available in Win 10, but it has known vulnerabilities too.
Do yourself a favor and update to Win 10.
I am aware of this.
How do I get rid of the error?
Is the entire BTC blockchain from BitcoinQT available for download as a ZIP?
Can I install Win 10 over Win 7 without losing my data?
I have ordered a new laptop but it takes a long time with the delivery.