Did you try this?
If windows will not boot.
Power computer on. Hold Alt and keep pressing F10 at the Acer logo. You may need a password. If you have used Erecovery before you would have been asked to create a password.
If your first Erecovery the default password is 000000
I tried as you instructed with no success. I also have a win 7 installation disk but have not been able to get any results using it. I also have tried to perform a "format " command but may have been typing it incorrect "format c:/q" ??? Not sure if that was the correct command. TIA for any advice you have to offer.