there is no admin as you know it from WinXP.one thing regarding Vista. you may have to disable UAC.
...or run as Administrator
the admin from Vista is a "pseudo" Admin.
most windowsXP applications have problems with UAC. problem is that if the application is crashing or producing issues, then ppl blame Vista.
in fact its the application which can not handle UAC, which means it does no longer have same "admin/access rights" as it had on WinXP.
symantec announced that they plan to improve UAC in that part.