0×800CCC60 – SMTP_RESPONSE_ERROR Invalid response.
0×800CCC61 – SMTP_UNKNOWN_RESPONSE_CODE Unknown error code.
0×800CCC62 – SMTP_500_SYNTAX_ERROR Syntax error returned.
0×800CCC63 – SMTP_501_PARAM_SYNTAX Parameter syntax incorrect.
0×800CCC64 – SMTP_502_COMMAND_NOTIMPL Command not implemented.
0×800CCC65 – SMTP_503_COMMAND_SEQ Improper command sequence.
0×800CCC66 – SMTP_504_COMMAND_PARAM_NOTIMPL Command not implemented.
0×800CCC67 – SMTP_421_NOT_AVAILABLE Command not available.
0×800CCC68 – SMTP_450_MAILBOX_BUSY Mailbox is locked and busy.
0×800CCC69 – SMTP_550_MAILBOX_NOT_FOUND Mailbox not found.
0×800CCC6A – SMTP_451_ERROR_PROCESSING Error processing request.
0×800CCC6B – SMTP_551_USER_NOT_LOCAL User mailbox is known, but mailbox not on this server.
0×800CCC6C – SMTP_452_NO_SYS

The partition boot sector is a small section of the hard disk partition that contains information about the operating system’s file system (NTFS or FAT32), as well as a very small machine language program that is crucial in assisting the operating system as it loads.

If you suspect that Windows won’t boot because the partition boot sector has been corrupted, you can use a special Recovery Console tool called Fixboot to fix it.

Start by accessing the Recovery Console.

To use the Fixboot tool, from the Recovery Console command prompt, type

Fixboot [drive]:

Where [drive] is the letter of the drive to which you want to write a new partition boot sector.

1. Restart your computer, and then press F8 during the initial startup to start your computer in Safe Mode with a command prompt.

2. Log on to your computer with an administrator account or with an account that has administrator credentials.

3. Type the following command at a command prompt, and then press ENTER:

c:winnt\system32\restore\rstrui.exe

System Restore is an extremely helpful tool built into Windows XP and Vista. System Restore runs in the background as a service and continually monitors system-critical components for changes. When it detects an impending change, System Restore immediately makes backup copies, called restore points, of these critical components before the change occurs. In addition, System Restore is configured by default to create restore points every 24 hours.

To use System Restore, first restart the computer by pressing [Ctrl][Alt][Delete]. When you see the message Please select the operating system to start or hear the single beep, press [F8] to display the Windows Advanced Options menu. Now, select the Safe Mode item from the menu and press [Enter].

Once Windows boots into Safe mode, click the Start button, go to All Programs -> Accessories -> System Tools, and select System Restore. Because you’re running in Safe mode, the only option on the opening screen of the System Restore wizard is Restore My Computer To An Earlier Time, make sure  it’s selected and click Next. Follow along with the wizard to select a restore point and begin the restoration procedure.

Confirm the date and time selected and click Next. Windows will perform the restoration and shut down. After the restoration Windows will restart and inform you that the restoration completed successfully. Click OK to continue the startup process.

When Windows begins to boot up and you see the message Please select the operating system to start or hear the single beep, press [F8] to display the Windows Advanced Options Menu. Then, select the Disable The Automatic Restart On System Failure item and press [Enter]. Now, Windows will hang up when it encounters the error and with any luck, it will display a stop message you can use to diagnose the problem.

When a Windows XP system wont boot up, you can often fix the problem using the Recovery Console. The Windows XP CD is bootable and will provide you with access to this tool.

To boot from the Windows XP CD, insert it into the CD-ROM drive on the problem system and reboot the computer.  The system should present you with the option to boot from the CD, simply follow the prompts that will allow the loading of the basic files needed to run Setup. If not, you will need to access the BIOS and enable booting from your CD or DVD drive.

 When you see the Welcome To Setup screen, shown below, press R to start the Recovery Console.

The master boot record occupies the first sector on the hard disk and is responsible for initiating the Windows boot procedure. The master boot record contains the partition table for the disk as well as a small program called the master boot code, which is responsible for locating the active, or bootable, partition, in the partition table. Once this occurs, the partition boot sector takes over and begins loading Windows. If the master boot record is corrupt, the partition boot sector can’t do its job and Windows won’t boot.

If your master boot record has been corrupted, you can use the Recovery Console tool Fixmbr to fix it. First, boot the system with the Windows XP CD and access the Recovery Console

To use the Fixmbr tool, from the Recovery Console command prompt, type

Fixmbr [device_name]

Where [device_name] is the device pathname of the drive to which you want to write a new master boot record. For example, the device pathname format for a standard bootable drive C configuration would look like this:

\Device\HardDisk0

As Windows begins to load, the Ntldr program refers to the Boot.ini file to determine where the operating system files are and what options to enable as the operating system continues to load. So if there’s a problem with the Boot.ini file, your PC will not boot up correctly.

If you suspect that your Boot.ini file has been corrupted, you can use the special Recovery Console version of the Bootcfg tool to fix it. To do this, you must first boot the system with the Windows XP CD and access the Recovery Console.

To use the Bootcfg tool, from the Recovery Console command prompt, type

Bootcfg /rebuild

There are several other parameter switches you can use with Bootcfg. These are listed here

• /Add–Scans the disk for all Windows installations and allows you to add any new ones to the Boot.ini file.
• /Scan–Scans the disk for all Windows installations.
• /List–Lists each entry in the Boot.ini file.
• /Default–Sets the default operating system as the main boot entry.
• /Rebuild–Completely re-creates the Boot.ini file. The user must confirm each step.
• /Redirect–Allows the boot operation to be redirected to a specific port when using the Headless Administration feature. The Redirect parameter takes two parameters of its own, [Port Baudrate ] | [UseBiosSettings].
• /Disableredirect–Disables the redirection

1. Plug in the drive
2. Open a command prompt and type “convert x: /FS:NTFS” where x = your drive letter.

Make sure you have any important data backed up before you do this.