A couple of years ago, I bought a used Lenovo T530 ThinkPad. So far, it has been functioning without any problem.
I was bugged quite awhile by Microsoft about upgrading to windows 11. I refused to upgrade every time I was receiving messages. Recently, they informed me that this laptop didn't have adequate hardware to switch to Windows 11. I know that with the Windows 11 OS, you will be spied on, and this is the reason why I don't want anything to do with Windows 11.
On my desktop, I'm using the free open source Ubuntu 24.04 Pro with a 10 year support. It is a Linux distribution OS, and It takes a little period of time to get acquainted with it, the commands are more complicated for instance. It's a very stable OS with frequent protection updates. Overall, I like it and I will eventually abandon the Windows 10 OS on the Lenovo and replace it with the Ubuntu product, which has not been subjected to malware to date. Also, with an open source product, the risk of being spied on is IMO unlikely.