Grade A Dell Latitude D820 15.4" Widescreen used Standard Laptop - Intel Core 2 Duo T7200 2.00GHz, 4GB RAM, SATA 2.5" 80GB HDD, None, Windows 10 Home 64-Bit - Walmart.com
im thinking of upgrading this old laptop making the 1gb of ram to 3gb and I've done a bit of research that you can change the cpu too im also thinking of
How to install windows 10 pro 64 bit on Intel core 2 duo with 2gb ram - YouTube
Intel Core 2 Duo Mobile T7200 LF80537GF0414M (BX80537T7200)
Intel Mobile Core 2 Duo T7200 @ 1994.81 MHz - CPU-Z VALIDATOR
Intel Cpu Pentium Mobile T7200 2.0Ghz Fsb667Mhz 4Mb Fcpga6 Core 2 Duo Tray