I'm also having this problem. I'm troubleshooting an Aspire 4810T model. The device was very slow and the epowertray and ODDPWR error box kept popping up. I've managed to resolve the popups but a lot of system errors being pop up by windows. Firewall service cannot be restarted.
I need to set the device back to factory default. System is using Vista Home Premium. Any help would be appreciated. No recovery/restore cd's were made by the user.