Shutdown option missing from start menu

[Guest]

I have Vista Business and Home Premium. Both OS let me set up my account
without problems. However after a short time (hours) after a restart my
shutdown/restart options in the start menu were gone (all I had was the lock
which could be expanded to logoff/switch user options), I could not get the
run command item to appear in the start menu, task manager was disabled by
the administrator, etc. I enabled the built-in administrator's account and
everything was good there, but I was left without the features I needed on my
account. Also I disabled the UAC option.

How can I get my shutdown/restart/run options back for the start menu, etc?

 

[Guest]

If you have UAC (User Account Control) disabled, try enabling this option.
Disabling UAC in Windows Vista can restrict your user accounts in undesired
ways. If your user is a standard account, try switching it to an
adminitrators account. This can also effect the way Windows Vista restricts
some things.