Why? Microsoft and Intel ended "Legacy" support for the series (Nehalem/Westmere) after Windows 8.1. If you install Windows 10 cleanly, Windows Update will install generic Microsoft Basic Display Adapter drivers. Your screen will look blurry, and your Aero Snap/Transparency will lag.
The i5‑540M (Arrandale, 2010) runs Windows 10 but may feel slow. For best results:
Intel has warned that versions like 15.40/45 have known security issues and recommends users exercise caution as they are provided "as is" without further updates.