Windows 10 RTM ?
RTM is an acronym for Release To Manufacturing, RTM versions are typically released to PC manufacturers before they are released to the general public
So long as that is a retail licence, then you will be okay, the version on that installer will update to the latest version once it is installed
Windows 10 RTM Keys
PKeyConfig : Win 10 RTM
Key : 44KN2-2HFV9-F8VHM-XMGGB-BBHX7
Key Status : Valid
Product ID : 00326-10113-20881-AA949
Extended PID : XXXXX-03261-011-320881-00-1049-9200.0000-1052021
SKU ID : 2b1f36bb-c1cd-4306-bf5c-a0367c2d97d8
Description : Win 10 RTM Core Retail
Edition ID : Core
Sub Type : [TH]X19-98871
License Type : Retail
Channel : Retail
Crypto ID : 3261 (cbd)
================================================
PKeyConfig : Win 10 RTM
Key : QXHNT-28429-2V6V9-FTW6T-PDKQV
Key Status : Valid
Product ID : 00326-10115-44335-AA659
Extended PID : XXXXX-03261-011-544335-00-1049-9200.0000-1052021
SKU ID : 2b1f36bb-c1cd-4306-bf5c-a0367c2d97d8
Description : Win 10 RTM Core Retail
Edition ID : Core
Sub Type : [TH]X19-98871
License Type : Retail
Channel : Retail
Crypto ID : 3261 (cbd)
================================================
PKeyConfig : Win 10 RTM
Key : 43FFT-RN3JB-BTPVG-7JDMT-3V63V
Key Status : Valid
Product ID : 00326-10113-06015-AA131
Extended PID : XXXXX-03261-011-306015-00-1049-9200.0000-1052021
SKU ID : 2b1f36bb-c1cd-4306-bf5c-a0367c2d97d8
Description : Win 10 RTM Core Retail
Edition ID : Core
Sub Type : [TH]X19-98871
License Type : Retail
Channel : Retail
Crypto ID : 3261 (cbd)
================================================
PKeyConfig : Win 10 RTM
Key : BWTJG-NV43G-2D4Y7-3BCH2-RVVX7
Key Status : Valid
Product ID : 00326-10113-06026-AA457
Extended PID : XXXXX-03261-011-306026-00-1049-9200.0000-1052021
SKU ID : 2b1f36bb-c1cd-4306-bf5c-a0367c2d97d8
Description : Win 10 RTM Core Retail
Edition ID : Core
Sub Type : [TH]X19-98871
License Type : Retail
Channel : Retail
Crypto ID : 3261 (cbd)
RTM is the version issued to manufacturers AFTER they have run all their bug checks on pre-release version and fixes have been integrated.
RTM is the 1st live public build, it gets its name because it goes to the manufacturer before the public so they can load systems before the actual release date.
It is fairly academic, with electronic distribution Microsoft will integrate new builds into their downloadable versions so the latest build is always the one available on line. No one should really have to install that RTM build any more.
