W10 changes user rights on folders

I am running a multiboot W7-pro and W10-pro with several harddisks build in the computer to discover that after W10 used a disk W7 wants to check it to find no errors. Beside that I am not allowed to delete some folders I created in W7 after using them in W10 and they are set to free for use for everybody. W7 now askes me to get permission from that everybody. I think they mean the W10-everybody. Understand that security is important nowadays but this is becoming a disaster!
Also discovered that running the backupapplication Cobian (that always did a perfect job in W7) now is not allowd to acces lots of files in W7 anymore after W10 did ?????something??????. Another example: I have two SATA backup 1 Tb Disks I switch every few weeks. W10 refused to see the new one after the first switch. Had to go deep into settings to carefully trying to open its content again as W10 told me zero bytes were used. In the end the 900 Gb data was there again but I have forgotten all the steps needed to fix it.

My best guess is that beside Microsoft is messing around with accounts and rights to get full control of your computer. They do not want you to be in control yourself anymore and you have to (must) only use W10 in the future.
I am starting to feel a big fool that upgraded to W10 as I am loosing control over my PC's and home-network day by day!!!!

Open an elevated command prompt and enter (assuming the directory you have a problem with is "D:\Problem Directory" - otherwise you'll want to change the bit in red...)

Code:

takeown  /f "D:\Problem Directory" /r
icacls      "D:\Problem Directory" /grant "%USERDOMAIN%\%USERNAME%":(F) /t

This will take ownership of the directory and then grant authority to the current user. hth

You need to click on Geavanceerd ("Go Advanced") and change the owner I think.

However you do it - though GUI or CMD, you need to take ownership and apply your user to have control.

I thought to explain CMD was easier than GUI is all.

SID s-1-5-21 are users. The fact it has a GUID not your name means your system doesn't know who it is. Presumably your old system. You can delete it through the GUI if you want.

Thank you for the details and got it working again like usual. Keep it in mind for you never know.
I will stop testing W10 and wait until December to give it another try........

OK, remember takeown and icacls and then you needn't worry about authority...

Hi halasz,
You are great. I searched for solutions to change multiple ownership but your 2 line code worked as a wonder and better than all solutions. Thanks for your help to us all.

You are welcome :)

Almighty1 said:

Have a question, do I still need to do the icacls line if it's not a network shared folder?

If you don't have authority, yes. takeown takes ownership while the icacls grants authority. You could be the owner and not have authority to do what you want or alternatively you could have the required authority without being the owner.

For example if you wanted to delete some folder that was owned by TrustedInstaller or System (like Windows.old or found000 directories) then taking ownership is not enough as you wouldn't have authority to delete (normally full control).

You could do the same thing through the GUI on "properties" > "security" > "advanced".

Here you would change owner to yourself and click apply but you still may not have authority to do what you want if you are not in the list of users/groups.

Then you would have to click on "Change Permissions" > "Add" and then add yourself with full control and click apply.

Depending on the original authority you may not be allowed to change it without taking ownership first.

In this situation I think command line is easier than the GUI but it does the same.