E-Machines eMachines Desktop PC "insert cd acer computer desk" Questions

Insert the recovery CD into the drive. shut the PC off. Restart the PC, once the recovery CD starts, then follow the on screen prompts to reinstall the operating system etc. If this does not work then

...insert your Windows CD/DVD and re-install windows by hitting any key when the prompt comes up and then following the directions on screen. Make sure you use the key on your computer when it asks for ...

...insert a password disc. So I went to user account and Chang the password and since i'v done that it won't alawo me to log in at all. It start fine but it wont allow me to log on with ether passwords. ...