I'm getting an error message that says "an unknown error has occurred while trying to load PcAnywhere drivers." How can I resolve this error?

You receives unknown error 0x80040600 occur, when you can try to send or receive emails.

You can use in-built scanpst.exe tool.This tool scan outlook and resolve some corruption without any guarantee.

Read complete article on Free Manual step and solution in this blog http://recoverlostdatatools.wordpress.com/

Is the driver Vista 32 compatible?

some people have been doing this

Launch Internet Explorer
Click the Tools menu
Select Internet Options
Click the Connections tab
Click the LAN Settings button
Make sure that that "Use a proxy server for your LAN" checkbox is unchecked
Click OK till you are out of everything, and then close Internet Explorer
Try again in iTunes to load the store
do a google search for "itunes error 306" for other discussion boards on the topic, seems to have occured after an itunes update conflicting with OS (go figure right?)...hope this helps =)

You may receive one of the following stop error messages while working on your Windows XP computer.
STOP: C0000221 unknown hard error
Path\File_nameSTOP: 0xC0000221 unknown hard error
C:\Winnt\System32\Ntdll.dll (or another specific file or driver)
STOP: 0xC0000221 STATUS_IMAGE_CHECKSUM_MISMATCH
Path\File_name
Note: The error message may be discussed in many different formats-blue screen or message box. It depends on when the corrupt file was detected.
Similarly, you may receive the following STOP messages when a critical system file fails to load on your Windows NT and Windows 2000 computer.
STOP: C0000221 unknown hard error
<path>\<file_name>STOP: 0xC0000221 unknown hard error
c:\winnt\system32\ntdll.dll
Note: Some other drive may also be given in the message.
On Windows 2000 the following error message may display:
STOP: 0xC0000221 STATUS_IMAGE_CHECKSUM_MISMATCH
<path>\<file_name>
You usually face this problem when an incorrect driver for one or more hardware is installed on your system. For instance, the error messages described above are displayed when you install a millions of instructions per second (MIPS) driver on a x86 system.
Cause of the Error
This error occurs if the file given in the error message is damaged.
Your Windows XP operating system checks the following files for integrity during system startup:

• All driver files, excluding the files that loaded using the system loader to start your system .
• All DLL (Dynamic Link Libraries) on the system. These include, Graphics Driver Interface (GDI), User, Ntdll, Crtdll, Shell, Kernel and several other DLL files on the system.
• On Windows NT and 2000 computers, all DLLs loaded in the Window server address space are also checked.

The problem may also occur if an Iomega Zip drive is connected to the same cable as your hard disk drive.
Resolution Method
You can resolve this issue by removing the corrupt driver from your computer and then reinstalling a fresh and healthy copy of the driver. You may need to use the Device Manager utility to remove the driver. It is recommended that you clean your registry with the help of a reliable tool, such as RegGenie to ensure that all entries related to the uninstalled driver are removed from the system. After you have completely removed the corrupt driver, restart your system and install a fresh copy of the driver on the system.
If this step does not resolve the problem, you may have to reinstall Windows XP.
It is recommended that you regularly clean your registry with the help of a registry cleaner tool and perform antivirus and antispyware scan using tools, such as Antivirus Plus and StopZilla to prevent such errors from occurring on your system.

GOOD LUCK :-)

Go to the bios and change the SATA into ATA before installing window xp. You will find this option under hard disk type.

1. This problem may occur if the file that is described in the error message is corrupted. The following files are checked for integrity when Microsoft Windows XP starts:
2. All driver files (except those that are loaded by the system loader to start. the computer)
3. All dynamic-link libraries (DLLs), including User, Graphics Device Interface (GDI), Shell, Kernel, Ntdll, Crtdll, and others.
4. This problem may occur if you install an inappropriate driver for your hardware. For example, you receive one of the error messages that are described in the "Summary" section if you install a MIPS driver on an X86-based computer.
   
   This problem may occur if an Iomega Zip drive is on the same integrated device electronics (IDE) cable as the hard disk drive.
   
5. To resolve this problem, obtain a new copy of the corrupted file or reinstall Windows XP. If you continue to receive any one of the error messages that are described in the "Summary" section after you reinstall Windows XP, a hardware problem or a network problem may exist.
6. This error message may be displayed in many different formats, including an error message that is displayed on a blue screen or an error message that is displayed in a dialog box. The type of format that the error message is displayed in depends on how much of the operating system was loaded when the corrupted file was detected.

Select from the list below

Windows
» HP Scanjet Scanners Supported and not Supported in Microsoft(R) Windows XP » Resolving 'Missing MSIEXEC.EXE File is Linked to Missing Export: MSI.DLL.222' Error Message During Installation of the HP Director Software » Resolving 'Scanner not supported' or 'Unsupported operating system' Error Messages » Resolving Image Zone Install Error 1402, 1406, 1714, 1904, 1935, 2203, or Unknown Error » Error 'The System Cannot Find the File Specified' While Attempting to Install the HP Photo & Imaging Software in Windows 98, 98se, or Me » 'Cannot Install This Hardware - The Required Section Was Not Found in the INF' Error Message in Windows XP » 'Error Install Failure' Message for the hpznfx01.exe Software Module Displays on the Computer When Installing HP Image Zone » The message 'Fatal error during installation' or 'Error Install Failure' Occurs When Installing HP Image Zone » A 'Fatal Error' or 'Error_Install_Failure' Error Message Displays on the Computer When Installing the Image Zone Software » The Error Message 'Error_Install_Failure' or 'Fatal Error' Occurs when Installing Image Zone Software
Macintosh
» Mac OS: Software Driver Install Causes Error, "Interface Lib Get Component Resource Could not be Found" » 'Cannot Install This Hardware - The Required Section Was Not Found in the INF' Error Message in Windows XP » 'Scanner could not be initialized' Message Displays in Mac OS X when the All-in-One Software is Installed » Mac OS: Software Driver Install Causes Error, "Interface Lib Get Component Resource Could not be Found"

According to hp help and support
When using iTunes for Windows you may get a disc failed error. An unknown error occurred (4280)
In this situation, if you attempt to burn a disc, the following error message may display: The attempt to burn a disc failed. An unknown error occurred (4280) You can resolve this error message by modifying a file in the iTunes CD Configuration folder. First, you need to verify the model of optical drive present. Verifying the Model of the CDRW/DVD Drive Verify that your PC has a Sony CD-RW/DVD CRX830E optical drive installed:

1. Open iTunes.
2. In the iTunes Help menu, click Run CD Diagnostics .
3. Insert an audio CD in the optical drive.
4. Click OK .
5. View the results in the CD Diagnostics window:
   • If IDE/CdRomSONY_CDRW/DVD_CRX830E is listed, proceed with the procedure below to resolve the error message.
   • If another drive name is listed, this document does not apply to your computer.

Resolving the Error Message When an IDE/CdRomSONY_CDRW/DVD_CRX830E model optical drive is present, do the following steps to resolve the error message: CAUTION: Take care in using the following steps.

1. Close iTunes and any other files and software that are open.
2. Click Start , My Computer , Drive C: , Program Files , iTunes , and CD Configuration to view the files in the CD Configuration folder.
3. Locate the file gcdrtype.cfg in the CD Configuration folder.
4. Right-click the file gcdrtype.cfg .
5. In the drop-down menu, click Open (you may need to select Notepad ) to edit the file gcdrtype.cfg in Notepad .
6. In the Notepad window, scroll to the bottom lines of the file gcdrtype.cfg .
7. Locate the line that reads: DRVGENERALFLAGS = MODESEL_NOPAGE01 | MODESEL_NOPAGE05
8. At the end of this line add " | NOSENDOPC " (the first character is a blank space), so the line then reads: DRVGENERALFLAGS = MODESEL_NOPAGE01 | MODESEL_NOPAGE05 | NOSENDOPC
9. At the top of the Notepad window, click File , Save .
10. At the top of the Notepad window, click File , Exit to close the window.
11. At the top of the CD Configuration window, click File , Close to close the window
12. Restart the computer.

You should now be able to burn an audio CD without displaying this error message. ---------------------------------------------------------------------------------------------If this answers your question please rate this as fixed.
Thanks for using fixya support..You have a wonderful day

Ok ensure that nothing has changed.. Check the Firewall setting, at BOTH ends, to ensure that the "Port" is Passed thru.. also check to make sure the address's used by PCanywhere are the same at both ends. Perhaps the port ya been using has become "Blocked" somehow? OR some setting have been changed.. carefully check it all out. GL