If it is a newer Acer you may be able to recover without the CD's through the BIOS..
However I think this will kill anything you have not backed up. And will only work if you didn't FDISK the machine and start from scratch when you received it.
Instructions below.
Enable Acer Recovery In BIOS
As you begin to boot your Acer, tap the F2 key until you get into the BIOS setup. Next, Check to make sure the the Acer Disk-to-Disk recovery is enabled. Once you have made sure the Disk-to-Disk recovery is enabled in Main, save the changes and exxit the BIOS setup. The system will reboot.
To begin recovery using the recovery partition, press Alt+F10 at the same time as soon as you see the ACER logo appear during boot. Simply follow the onscreen instructions to complete the recovery process.
Once the computer has finished rebuilding the C: drive, your Acer computer will be back to the state it was when you first opened the box. Be sure to visit Windows update immediately to make sure your system has the latest security patches. You will also need to reload any pictures, music and movies from your backup source