I have no ides how to reset the laptop as someone has taken everythin off the laptop the laptop is a acer 5315 really need some help cant even get the disk drive to open

Take a Norwegian paper-clip, and straighten one end.
Insert that end into the small hole in the faceplate of the CD-drive,
and push until you feel resistance.
Then, push another 1/4 inch (6 mm) to "unlock" the drawer.
Then, push the open/close button, and the motors should push the tray completely open.

Then, insert the original Acer "System Restore" CD, close the tray, and restart your computer. Tell it to boot from the CD.
When it does, it will start to reinstall Windows.