If you deleted the hidden partitionl, you need to purchase the recovery discs.
If you didn't delete the partition, you can run the recovery by following the below steps:
Note: These steps will return the system to the original factory installation including all factory installed drivers and applications.
Back up all data prior to using this procedure.
Plug in the AC adapter and battery.
Turn the system on
Immediately, press ALT on the keyboard and start tapping F10.
Continue holding ALT and tapping F10 as the unit boots up.
A screen stating "Starting Acer Erecovery" should appear.
(Release ALT and stop tapping F10 at this point)
There will be 4 options:
1. Restore system to factory default
2. Restore system from user backup
3. Restore system from cd/dvd