bobmac
Major Champion
As a last resort, try this.
Transfer ALL the data you want to keep onto some kind of external memory, phots, music etc then switch it off.
When you switch it back 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)
Choose Restore System Factory Default
Bob's your mum's brother.
This will empty everything and reinstall the machine to how it was the day you bought it so you will lose everything.
HTH
Transfer ALL the data you want to keep onto some kind of external memory, phots, music etc then switch it off.
When you switch it back 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)
Choose Restore System Factory Default
Bob's your mum's brother.
This will empty everything and reinstall the machine to how it was the day you bought it so you will lose everything.
HTH