How do you keep applications you install on one account away from another account on a pc if both admin?

To keep applications installed on one admin account separate from another on the same PC, you can install applications only for the specific user account instead of for "All Users." During installation, choose the custom installation option and select the option to install for the current user only. Additionally, you can manage application permissions and use separate user profiles or folders to further isolate the applications from each other. Finally, consider using virtualization software or separate user accounts to enhance isolation between accounts.