单项选择题

A user has discovered that even though they are using the latest version of the anti-virus software,the computer is still being infected by a virus. Which of the following is the BEST solution for this problem?（）

A. Replace the computer.
B. Run chkdsk /f.
C. Update the virus signatures.
D. Run scandisk.

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多项选择题

A. C:\documents and settings\administrator
B. C:\windows\system
C. C:\users\system 32
D. C:\winnt
E. C:\windows

单项选择题

A. Memory is bad or not seated.
B. Fans are failing.
C. Power supply needs to be replaced.
D. CD-ROM is faulty and needs to be replaced.

单项选择题

A. BOOT.INI file is configured incorrectly
B. Corrupt MBR
C. Boot sector virus
D. System file is missing components