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Support for Windows Vista Service Pack 1 (SP1) ends on July 12, 2011. To continue receiving security updates for Windows, make sure you're running Windows Vista with Service Pack 2 (SP2). For more information, refer to this Microsoft web page: Support is ending for some versions of Windows.

Symptoms

You upgrade Windows XP Service Pack 2 (SP2) to Windows Vista or to Windows Vista Service Pack 1 (SP1). However, the following Windows Time Synchronization service (W32Time)-related registry settings are not updated to the default Windows Vista values.

Default registry settings in Windows XP

Registry location

Value name

Value type and data

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config

LargePhaseOffset

dword:00138800 (Decimal:1280000)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config

SpikeWatchPeriod

dword:0000005a (Decimal:90)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpClient

EventLogFlags

dword:00000000 (Decimal:0)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpServer

Enabled

dword:00000001 (Decimal:1)

Default registry settings in Windows Vista

Registry location

Value name

Value type and data

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config

LargePhaseOffset

dword:02faf080 (Decimal:50000000)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config

SpikeWatchPeriod

dword:00000384 (Decimal:900)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpClient

EventLogFlags

dword:00000001 (Decimal:1)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpServer

Enabled

dword:00000000 (Decimal:0)

This article helps you fix the problem.

To have us fix this problem for you, go to the "Fix it for me" section. If you would rather fix this problem yourself, go to the "Let me fix it myself" section.

Fix it for me

To fix this problem automatically, click the Fix this problem link. Then click Run in the File Download dialog box, and follow the steps in this wizard.





Note This wizard may be in English only; however, the automatic fix also works for other language versions of Windows.

Note If you are not on the computer that has the problem, you can save the automatic fix to a flash drive or to a CD, and then you can run it on the computer that has the problem.

Now go to the "Did this fix the problem?" section.

Let me fix it myself

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 How to back up and restore the registry in WindowsTo manually change these settings to the default Windows Vista values, follow these steps:

  1. Click Start, type
    regedit in the Start Search box, and then click regedit in the Programs list. If you are prompted for an administrator password or for confirmation, type the password, or click Continue.

  2. Locate and then click the following registry subkey:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config

  3. Right-click LargePhaseOffset, and then click Modify.

  4. In the Value data box, type
    02faf080, and then click OK.

  5. Right-click SpikeWatchPeriod, and then click Modify.

  6. In the Value data box, type
    00000384, and then click OK.

  7. Locate and then click the following registry subkey:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpClient

  8. Right-click EventLogFlags, and then click
    Modify.

  9. In the Value data box, type
    1, and then click OK.

  10. Locate and then click the following registry subkey:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpServer

  11. Right-click Enabled, and then click
    Modify.

  12. In the Value data box, type
    0, and then click OK.

  13. Exit Registry Editor.

  14. Restart the computer.

Did this fix the problem

Check whether the problem is fixed. If the problem is fixed, you are finished with this article. If the problem is not fixed, you can contact support.

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More information

Value name

Description

LargePhaseOffset

Specifies the time offset, in tenths of a microsecond (A tenth of a microsecond is equal to 10 to the power of -7). Times that are larger than or equal to this value are considered suspicious and possibly incorrect.

SpikeWatchPeriod

Specifies how long, in seconds, that a suspicious time offset must persist before it is accepted as correct.

EventLogFlags

Stores configuration data for the policy setting, Configure Windows NTP Client.

Enabled

Indicates whether the NtpServer provider is enabled in the current Time Service.

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