-Now a
system restore only goes back to a previous date, as you attempted to do.
If there are dates that you can not click on to restore to, that means there is no backup for that particulart date.
The only dates you can go back to are the ones that it will allow you to go back to.
-A
system recovery is when you go back to the way it was when you first bought it.
So, you can choose to go back to a date it will let you or you can do a system recovery back to factory settings. You would need your recovery disks that came with computer to do the recovery.
Not being familiar with your machine, see if you have your manuals/disks or what you would need to recover your system back to new.
You would have received disks or the recovery software is on a hidden drive on your computer.
Also, When you start your computer, check to see what options you have when starting. Such as, Hit F2 for, Hit F12 for and so on.
Below is a link for emachine support if you can't find manuals or disks to ask how to recover your system
E-Mail Technical Support
Click here to fill out your request for technical assistance via e-mail. Be sure to include the model number of your eMachines product. The more specific you can be with the details of your concern and the information supplied, the better your results!
eMachines Support: Product Support and Downloads
Post back if poosible