Black Screen After Powered off During Check Disk

Hello,

I installed the free avg pc tuneup last night and after running it suggested I do a disk check. I did that not realizing what it was and after 45 min it was late and I needed to head to bed. I looked at the screen and it seemed frozen so I powered off my computer by pressing the power button. Not realizing there were repercussions to this...

Now I have the black screen after the initial logo.

I can't go into safe mode. the last file to come up is the avgidsha.sys

I can't do a system restore it says that there are no restore points

I tried to do the last known good configuration but that does not work.

I opened command prompt and ran chkdsk c: /f and with /r and those did not work. They said I had zero problems but then I would get this message "failed to transfer logged messages to the event log with status 50"

Startup Repair says it could not detect a problem

I don't have the installation disk.

I tried running scf scannow in command prompt and it would not run

what can I do?

Toshiba Satellite A505-S6980