|There appear to be two ways to reset/restore it to as new...|
This is one source for the (user) manual for your model:
Ignore the language setting (top right) but enter acer aspire 5335 in the search box...
It will cough up many language versions; scroll down a little to English... and download. You get one go and then have to wait about 30mins or so if need to download again...
Pages 41 and 45 discuss the disk to disk method, and the recovery partition routine... You need to go into bios settings to enable the disk to diss approach:
copied from the manual at above source:
Enable disk-to-disk recovery
To enable disk-to-disk recovery (hard disk recovery), activate the BIOS utility, then select Main from the categories listed at the top of the screen. Find D2D Recovery at the bottom of the screen and use the <F5> and <F6> keys to set this value to Enabled.
I want to restore my computer to its original settings without recovery CDs.
Note: If your system is the multilingual version, the operating system and language you choose when you first turn on the system will be the only option for future recovery operations.
This recovery process helps you restore the C: drive with the original software content that is installed when you purchase your notebook. Follow the steps below to rebuild your C: drive. (Your C: drive will be reformatted and all data will be erased.) It is important to back up all data files before using this option.
Before performing a restore operation, please check the BIOS settings.
1 Check to see if Acer disk-to-disk recovery is enabled or not.
2 Make sure the D2D Recovery setting in Main is Enabled.
3 Exit the BIOS utility and save changes. The system will reboot.
Note: To activate the BIOS utility, press <F2> during POST.
To start the recovery process:
1 Restart the system.
2 While the Acer logo is showing, press <Alt> + <F10> at the same time to enter the recovery process.
3 Refer to the onscreen instructions to perform system recovery.
Important! This feature occupies 15 GB in a hidden partition on your hard disk
This (fyi) is the actual service manual for the 5335; which oddly doesn't appear to include factory reset/restore info...? But is is pretty complete otherwise...
And this is the Acer how to go about it from their knowledge/support area:
and the link therein takes you to here:
http://tinyurl.com/m7p2hp4 - the actual instructions...
Presumably you have copied all your personal stuff (the stuff you wouldn't like to lose) to dvd and/or an external hard drive?