单选题 You are an administrator of Ezonexam.com's network. You want to perform routine upgrades on your Windows 2000 Server computer. You use your non-administrator user account in the domain to logon to the server.You want to upgrade all of the critical system files and patches on the server in the shortest possible time.What should you do?

A、 Use Windows Update.
B、 Run System File Checker.
C、 Log on as administrator and run Windows Update.
D、 Log on as administrator and run System File Checker.

【正确答案】 C

【答案解析】解析：Explanation: Windows Update is used to upgrade the system files and to retrieve and apply the latest service packs and patches for the operating system. All necessary files are downloaded through the Internet. To be able to run Windows Update we must have administrative rights. Incorrect answers: A: The non-administrative user account cannot be used to run Windows Update. To run Windows Update we must have administrative rights. B: System File Checker checks the integrity of the system files. It cannot be used to upgrade the system files or to retrieve and apply the latest service packs and patches for the operating system. D: System File Checker checks the integrity of the system files. It cannot be used to upgrade the system files or to retrieve and apply the latest service packs and patches for the operating system.