Slow network performance when you open a file that is located in a shared folder on a remote network computer (829700)

RESOLUTION

Windows XP

To resolve this issue for Microsoft Windows XP, follow the directions in the "Changing the registry" section.

Windows 2000

To resolve this issue for Microsoft Windows 2000, first obtain and install the latest service pack for Windows 2000, and then follow the directions in the "Changing the registry" section. To resolve this problem, obtain the latest service pack for Windows 2000. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Changing the registry

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

1. Add the SuppressionPolicy DWORD value to the following registry key:

   HKEY_CLASSES_ROOT\*\Shellex\PropertySheetHandlers\CryptoSignMenu

   To do so:
   1. Click Start, and then click Run.
   2. In the Open box, type regedit, and then click OK.
   3. Locate and then click the following registry key:

      HKEY_CLASSES_ROOT\*\Shellex\PropertySheetHandlers\CryptoSignMenu

   4. On the Edit menu, point to New, and then click DWORD Value.
   5. Type SuppressionPolicy, and then press ENTER.
   6. On the Edit menu, click Modify.
   7. Click Hexadecimal, type 100000 in the Value data box, and then click OK.
2. Add the SuppressionPolicy DWORD value to the following registry key:

   HKEY_CLASSES_ROOT\*\Shellex\PropertySheetHandlers\{3EA48300-8CF6-101B-84FB-666CCB9BCD32}

   To do so:
   1. In Registry Editor, locate and then click the following registry key:

      HKEY_CLASSES_ROOT\*\Shellex\PropertySheetHandlers\{3EA48300-8CF6-101B-84FB-666CCB9BCD32}

   2. On the Edit menu, point to New, and then click DWORD Value.
   3. Type SuppressionPolicy, and then press ENTER.
   4. On the Edit menu, click Modify.
   5. Click Hexadecimal, type 100000 in the Value data box, and then click OK.
3. Add the SuppressionPolicy DWORD value to the following registry key:

   HKEY_CLASSES_ROOT\*\Shellex\PropertySheetHandlers\{883373C3-BF89-11D1-BE35-080036B11A03}

   To do so:
   1. In Registry Editor, locate and then click the following registry key:

      HKEY_CLASSES_ROOT\*\Shellex\PropertySheetHandlers\{883373C3-BF89-11D1-BE35-080036B11A03}

   2. On the Edit menu, point to New, and then click DWORD Value.
   3. Type SuppressionPolicy, and then press ENTER.
   4. On the Edit menu, click Modify.
   5. Click Hexadecimal, type 100000 in the Value data box, and then click OK.
4. Add the Flags DWORD value to the following registry key:

   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\SCAPI

   To do so:
   1. In Registry Editor, locate and then click the following registry key:

      HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\SCAPI

   2. On the Edit menu, point to New, and then click DWORD Value.
   3. Type Flags, and then press ENTER.
   4. On the Edit menu, click Modify.
   5. Click Hexadecimal, type 00100c02 in the Value data box, and then click OK.
   6. Quit Registry Editor.

Adding a Group Policy

Besides the direct registry modifications that are described in the "Changing the registry" section, you can also resolve this issue by using a Group Policy. Administrators can control which shell extensions can run by using the Approved key and the EnforceShellExtensionSecurity policy. The SuppressionPolicy value is tied to the EnforceShellExtensionSecurity policy. You can add this policy to enable the modified shell behavior.

To do this, follow these steps:

1. Click Start, click Run, type Gpedit.msc, and then click OK.
2. Under User Configuration in the left pane, expand Administrative Templates, expand Windows Components, and then click Windows Explorer.
3. In the right pane, double-click Allow only per user or approved shell extensions, click Enabled, and then click OK.

For more information about the EnforceShellExtensionSecurity policy, click the following article number to view the article in the Microsoft Knowledge Base: