I am the adminstrator of my PC. I have Windows XP Pro SP2 installed with all the latest updates. The problem is: since today, I have been getting Access Denied error. Whenever I try to modify any service or change in System Configuration Utility (msconfig.exe), I get an Access Denied error. The error says: An Access Denied error was returned while attempting to change a service. You may need to log on using an Administrator account to make the specified changes. Kindly help me.