08-01-2017 11:44 AM
Welcome to the Community Forums.
Certified Operating System for the G50-80 machines upon original release and testing was with :
Other factors to be considered are the user's personal applications and usage/intentions.
08-01-2017 02:45 PM
And if poster would be able to verify:
G50-80 Laptop (Lenovo) - Type 80E5 - Model 80E503GBIH
Motherboard Part number : 5B20K62236 MBL G50-80NOKI3-5005U(P) UMA
2GHz Intel Core i3-5005U 5th Gen processor (codename: Broadwell)
4GB DDR3 RAM
1TB 5400rpm Serial ATA hard drive
15.6-inch screen, Intel HD Graphics
Current OS: DOS
4 hours battery life, 2.5kg laptop
So it came with DOS (no Windows operating system) and is also compatible with Creators update for Windows 10 Home and pre-tested with Windows 8.1.
Available drivers for both Windows 8.1 and Windows 10 from here on the support page.
Now to decide which is best for you, you may install each within its trial period as 4GB ram may be a challenge in its performance along with the applications you intended to use it with.