On June 9 I selected "update and shut down" on my Toshiba Satellite L55 running Windows 8.1 and went to bed.

The next morning the following processes no longer worked on my laptop: no audio - "audio service not running" (audio troubleshooter didn't fix it - device manager says sound card working properly), no upper row function keys (can't turn my touchpad back on, for example), control panel icons don't appear, PC settings -> Updates & Recovery not functioning.  There was no error message saying updates had not installed.  Processes often stop responding and I have to use Task Manager to shut them down.  Even though no windows are open, at shutdown I get task host messages preventing shutdown.

The only functionality remaining are the apps that don't require sound, IE connection, my wireless mouse and the optical drive.  I fortunately backed up my files just prior to June 9, but I don't know how to get to the update files to uninstall them since control panel and PC settings aren't working.  I can't restore to a previous date since I can't access Recovery.  I have spent hours online looking for a fix.

• Edited by mmedakar 13 hours 45 minutes ago

Can you reboot into "last known good config" mode and check?

Hello,

You can do a System Restore at boot, in case you're not able to get Recovery options at PC Settings. Refer this guide:

http://www.eightforums.com/tutorials/4935-startup-options-menu-boot-windows-8-a.html

Hope this helps, Good luck :)