You try to download a file that is larger than 50000000
bytes from a Web folder on a Microsoft Windows XP Service Pack 2 (SP2)-based
computer. You may receive an error message that is similar to the following:
Cannot Copy FileName: Cannot
read from the source file or disk
Note In this error message,
FileName is a placeholder for the name of the file.
This problem
also occurs on a Windows Vista-based computer or a Windows XP Service Pack 1
(SP1)-based computer that has security update 896426 (MS05-028)
installed
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This issue occurs because a security change in Windows XP
SP2 affects the Web Distributed Authoring and Versioning (WebDAV) redirector.
This security change makes sure that an unauthorized server cannot force a
client computer into a denial of service attack. If you try to download a file
that is larger than 50000000 bytes, the client computer interprets this
download as a denial of service attack. Therefore, the download process
stops.
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Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 (http://support.microsoft.com/kb/322756/) How to back up and restore the registry in Windows
To resolve this issue, follow these steps:
| 1. | Click Start, click Run,
type regedit, and then click OK.
|
| 2. | Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters
|
| 3. | In the right pane, right-click the
FileSizeLimitInBytes value, and then click
Modify.
If you cannot see the
FileSizeLimitInBytes value, right-click the blank space in the
right pane, click New, click DWORD Value,
type FileSizeLimitInBytes, and then click
OK. |
| 4. | In the Edit DWORD Value box, click to
select the Decimal option. In the box under Value
data, type a value that is larger than the size of the file that you
want to download. Click OK.
Note The default value for the file size limit is 50000000
bytes. |
| 5. | Quit Registry Editor. Restart the computer. |
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