that's the first thing I tried, but still nothing.
hmm, why not state that up front in the first post?
You can trouble shoot by logging into guest account to see if problem persist
restart in SafeBoot Mode to see if there is third-party plug-in / extention problem
OK, some awkward stuff going on over here.. Restarted it in Safe mode, menu bar showed up.
This may indicate you have third-party extention interfering on start-up, or you are firing up third-party software.
Open your >SysPreferences>Users&Groups> Log-in items and remove any added third-Party that could be interfering. Need to unlock the padlock - sign to fully remove form the list
When switching to guest account all I get is a gray screen and a mouse pointer, force reset rquired.
You may have something bigger going on here.
Terminal cannot kill systemUIServer process, and systemuiserver.plist file does not exist on my macbook.
I thought you said this is the first thing you tried above?
The com.apple.systemuiserver.plist is in your user folder ~/Library/Preferences/ com.apple.systemuiserver.plist
The ~/Library is hidden in Lion however Finder>Go (dropdown menu) hold the option key to see the ~/Library
Terminal cannot kill systemUIServer
This is not correct command line, unix is case sensitive, it should read:
Short of this I would consider backing up and re-installing the OS X Lion if problems persist.