windows.old / windows10upgrade :(

Hi , i format my PC today full clean installation i select advanced option then full clear i delete partitions and format , then i notice right now in my PC disk C inside have two folder windows.old and windows10upgrade idk why ?? if i did full format is this normal ?? and when i go disk clean select C dont appear this folders , my previous windows before format is 10 , i format beacuse new video card and for a full clear instalation btw this is my 6 format on windows 10

any idea why this two folder are there ? or is normal to this folder come if you do a full format ?

ohh let me add , after the format i scan for windows update and then i update ALL , but after i see there no find the microfsoft update aniversary i click in the option to learn more then open a website and then download a program called windows 10 upgrade assistent and then this program install me the anniversary update , but this windows 10 upgrade assistent is who create this two folder ?? , idk why beacuse is not a upgrade from windows 7-8 to 10 is simple upgrade windows 10 to an uograde to anniverary , there no reason to create this two folder , btw the windows.old folder is about 8 gb or sometime the other is very small

Yuniel said:

ohh let me add , after the format i scan for windows update and then i update ALL , but after i see there no find the microfsoft update aniversary i click in the option to learn more then open a website and then download a program called windows 10 upgrade assistent and then this program install me the anniversary update , but this windows 10 upgrade assistent is who create this two folder ?? , idk why beacuse is not a upgrade from windows 7-8 to 10 is simple upgrade windows 10 to an uograde to anniverary , there no reason to create this two folder , btw the windows.old folder is about 8 gb or sometime the other is very small

The Anniversary Update is not a simple patch to your existing windows. It is a full install of a completely new version of Windows 10 called version 1607. You probably did a clean install of version 1511. The Upgrade assistant upgraded this to version 1607. That's why you have a Windows.old folder, your older version 1511 is kept there in case you want to go back to it. For 10 days after you installed the Anniversary update you will have the option to go back to the earlier one. This is in Settings > Update & security > Recovery. After 10 days the windows.old folder will be automatically deleted and the option to go back will be greyed-out and no longer available.