I don’t know why, but it is impossible to install Nuendo Live 3. I’m french user.
It states you do not have enough permission to install it. Is this account your ROOT ADMIN user account, on that computer? If not, consult the owner / administrator so they can help you out.
It also states that you do not have permission to write into the folder C:\Users\Omar\PC\AppData\Roaming\Steinberg\Nuendo Live 3.