Error to recreate new ssh key: gitconfig: Permission denied

On the computer where I work, there was another user. However I have to create a new ssh key and a new user.

But when I run the commands:

  

$ git config --global user.name "alex jose silva"

I get the message:

  

error: could not lock config file C: / Program Files   (x86) /GNU/SSH/.gitconfig: Permission denied

I chose to delete the SSH folder of the computer because error persists

  

error: could not lock config file C: / Program Files   (x86) /GNU/SSH/.gitconfig: No such file or directory