With most laptop computers, you can restore the operating system back to factory settings by using a recovery disk. The Acer Aspire One series of netbooks do not have an optical CD or DVD drive, so a recovery disc is not an option. Instead, the Aspire One series includes a built-in partition on the hard drive that already has all of the recovery information. You can quickly restore your Acer netbook back to its original condition by accessing the partition and running the recovery tool.
Consider what data you still need from your Acer Aspire One's hard drive. Save the files to an external USB device.
Restart the Acer Aspire One's operating system. Wait for the Acer logo to appear on the LCD screen.
Press the "Alt-F10" keys at the same time to bring up the recovery menu. Press "Enter."
Click "Next." Follow the prompts that appear on the screen to restore the operating system back to factory settings.
Use the drop-down boxes to select the time zone and language information for your Acer Aspire One. Restart the netbook when you are prompted to finish restoring the computer.
Connect the external USB device to your Acer Aspire One and transfer the data you saved earlier back to the netbook.
It is possible to delete the hard drive partition that has the recovery tool. If your Acer Aspire One no longer has the recovery partition, you will need to acquire an external USB DVD drive and then contact Acer for a recovery DVD. Connect the USB drive to the netbook's USB port and then insert the recovery DVD in the drive.