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MCSA/MCSE Self-Paced Training Kit (Exam 70-270): Installing ...

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Table 4-11 Major Recovery Console Commands<br />

Command Description<br />

Lesson 3 Troubleshooting Problems Using Startup and Recovery Tools<br />

More Displays a test file.<br />

Rmdir (rd) Deletes a folder.<br />

Rename (ren) Renames a single file.<br />

Systemroot Sets the current folder to the %systemroot% folder of the system you are currently<br />

logged on to.<br />

Type Displays a text file.<br />

See Also You can also use Recovery Console to restore System and Software files, which<br />

are stored in the %systemroot%\System32\Config folder, with a backup copy that is stored in<br />

the %systemroot%\repair folder. Windows XP Professional uses these files to create the registry<br />

keys HKEY_LOCAL_MACHINE\SYSTEM and HKEY_LOCAL_MACHINE\SOFTWARE. The Windows<br />

Backup program automatically backs up these files when you back up the System<br />

State. For more information about backups and about restoring these files by using Recovery<br />

Console, see Chapter 20, “Backing Up and Restoring Data.”<br />

Real World Fixing Corrupted Boot Files<br />

Although the Recovery Console is useful for replacing missing and corrupted boot<br />

files such as NTLDR and for fixing problematic MBRs, this is an area in which you<br />

should be careful. One of the most common reasons for MBR and NTLDR problems<br />

is a type of virus known as a boot sector virus—a virus that resides in the<br />

MBR. Once entrenched, boot sector viruses can set about corrupting other files,<br />

such as NTLDR. Boot sector viruses can also be difficult to get rid of because they<br />

can often survive even a full reformatting of a hard disk. Even if you use the<br />

Recovery Console to fix a corrupted boot file, you should not assume that you<br />

have gotten to the root of the problem.<br />

Fortunately, there are some fairly simple steps you can take to help prevent boot<br />

sector viruses from ever becoming a problem. First, all computers should be running<br />

good antivirus software that is kept up-to-date with the latest virus information.<br />

You should configure the antivirus software to perform full system scans<br />

regularly—scans that include the MBR. On most computers, you can also configure<br />

BIOS to prevent virus-like activity (which essentially means that it will prompt<br />

you before it allows any program to write information to the boot sector).<br />

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