I would start off with a Permissions repair: retart holding the "alt" key and choose "Recovery Disk". Once mounted select your disk from the left hand side pane (normally Macintosh HD unless renamed) and click "Repair Permissions". This can take a good few minutes so be patient. Once this is done I also suggest that you click "Repair Disk" for good measure. Once this is done restart.
Maybe this will help with the sleep issue:
Your profile shows 10.8.2.
If reinstalling the updater doesn't fix things, hereb are some other troubleshooting recommendations:
Try setting up another admin user account to see if the same problem continues. If Back-to-My Mac is selected in System Preferences, the Guest account will not work. The intent is to see if it is specific to one account or a system wide problem. This account can be deleted later.
If the problem is still there, try booting into the Safe Mode. Shut down the computer and then power it back up. Immediately after hearing the startup chime, hold down the shift key and continue to hold it until the gray Apple icon and a progress bar appear. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart. For each disable/delete, you will need to restart if you don't do them all at once.