Win10 is not my choice due to its mobile UI oriented UX but it's the latest one from Microsoft. I installed Win10 - but found that Lenovo officially don't support Win10 on my model.
Win10 is fast, quite faster than Win7 - even the installation is faster.
Anyway main two issues I found with Win10 - and therefore I am now back to Windows 7 with Classic Shell.
1. Drivers are not available officially. I had a broken installation of Nvidia Graphics - but somehow it worked to bring my display resolution to 1366 x 768. The driver of WiFi for Win7 somehow worked.
2. With these troubles, I had another big issue. Win10 had got into Blue Screen error several times and restarted. IRQL_ unexpected_ value is the error code and I found that it's may be due to improper WiFi driver.
