Need some help? :D

I have downloaded comodo dragon browser and have the setup and the browser installed onto my USB drive but my school laptop still won’t allow me to open it up. Is there any way to bypass this? It just tells me I do not have administrative permissions.

EDIT: The exact message I get is: “Windows cannot access the specified device, path, or file. You may not have the appropriate permissions to access the item.”

Did you install it using the installation option of USB installation.