sallyanne wrote:
Can people access your computer if the wireless is left on but the computer is turned off? Sometimes I leave it on sleep but mostly turn it off at the laptop.
No... a computer with an Ethernet wire link and the "wake-on-lan' feature enabled in the BIOS can be accessed by waking it up but this is really meant for servers.
Your main "danger" with a wireless router left on is someone connecting to the Internet through it. If this is done for unlawful purpose, they will trace the problem back to your home... But they can access the router when you are using it so the solution is mostly to use secure wireless protocol (WPA) (WEP is very easily cracked).