|You've got a few different problems here:|
1) Although you're logged in as administrator, you will almost always be treated as a non-administrator (user). This is a security feature of Windows Vista and it is referred to as the User Account Control (UAC). Usually the solution for this type of problem is to right-click the application and choose "Run As Administrator" from the right-click menu.
2) You are not properly communicating whether your problem is Windows Updates, Antivirus Updates, or something related to your Sony Vaio's complimentary software. Please be more specific on the problem you're experiencing and don't concentrate as much on communicating what you've tried. Often the attempts made to fix problems are unnecessary or downright incorrect.