I have a toshiba satellite m45, model #psm4ou-073001. I had just finished sending an email with attachments and started to check a different account and found that several keys quit working . the keys are sdz,./gj[ ]q
is there a common connection between these keys? why would 11 keys quit at one time? I cleaned and dusted the keyboard with no results. any ideas? please help. thank you very much.

Remove the keyboard, clean with canned air such as Dust Off, and replace, hoping it has been a bad connection. The Toshiba laptop keyboards are generally very reliable.