Dell is not testing or developing Windows 10 drivers for this product. If you choose to upgrade, some features, applications, and connected devices may not work as expected.
So I am just out of luck, I can keep on using but when I have had enough of it locking up and rebooting that I have to buy a new one?
You would not have to purchase a new computer. You can reinstall Windows 7 back on the computer and it should be fine.
The thing is that we invest to Dell laptop with i7 and 8 GB RAM so as not to be able in 4 years not to be able to upgrade to the new OS ? Does it make sense? No. We would like at least all this devices that fulfill more than expected the requirements to be able to upgrade to windows 10.
Windows 10 will run just fine on that system. If it's freezing after the upgrade,
1. Run an extended diagnostic on the hard drive. F 12 at powerup. If the drive is original to the system, it's at or near the end of its expected lifespan.
2. If that turns up no errors, consider doing a clean install of Windows 10 -- it may have carried over problems from the original installation.