User Account Control denies access to stuff like that.
Do one of two things:
1) Take ownership of the file:
- Right-click on the file, left-click Properties.
- Click the "Security" tab. Click "Edit". On the UAC prompt, click "allow"
- Click "Advanced."
- Click the "Owner" tab.
- Change the owner to "Administrators."
- Click Apply, then OK. Again, click "allow" on the UAC prompt.
- Try opening it.
or
2) Turn off User Account Control for now.
- Click Start -> Control Panel.
- In Classic View, double-click "User Accounts."
- Click the check box "Turn User Account Control on or off." On the prompt, click "Allow."
- When asked to restart your computer, say Yes.
- After reboot, the computer will nag you about UAC being turned off. That's okay for the time being.
- Try opening up the cbs.log now.
