Symptoms
On a computer that is running Windows Vista or Windows Server 2008, you open Device Manager to review the properties of a driver. However, the Digital Signer field on the
Driver tab displays the following status message:
Not digitally signedThis behavior occurs even though the driver is digitally signed.
Cause
This problem occurs because Device Manager verifies the digital signing information by using the class GUID of the previous driver and the driver name of the current driver. Because no driver is found to match the old class GUID, Device Manager detects the driver as an unsigned driver.
Resolution
Hotfix information
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=supportNote The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.
Prerequisites
No prerequisites are required.
Restart requirement
You do not have to restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
Windows Vista and Windows Server 2008 file information notes
-
The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.
Version
Product
Milestone
Service branch
6.0.6000.20xxx
Windows Vista
RTM
LDR
6.0.6001.22xxx
Windows Vista SP1 and Windows Server 2008 SP1
SP1
LDR
-
Service Pack 1 is integrated into Windows Server 2008. Therefore, RTM milestone files apply only to Windows Vista. RTM milestone files have a 6.0.0000.xxxxxx version number.
-
The MANIFEST files (.manifest) and MUM files (.mum) installed for each environment are listed separately. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows Server 2008 and of Windows Vista
|
File name |
File version |
File size |
Date |
Time |
Platform |
|---|---|---|---|---|---|
|
Devmgmt.msc |
Not Applicable |
145,640 |
13-Dec-2007 |
20:25 |
Not Applicable |
|
Devmgr.dll |
6.0.6000.20879 |
377,344 |
18-Jul-2008 |
03:14 |
x86 |
|
Dmocx.dll |
6.0.6000.20879 |
42,496 |
18-Jul-2008 |
03:14 |
x86 |
|
Devmgmt.msc |
Not Applicable |
145,640 |
18-Dec-2007 |
21:40 |
Not Applicable |
|
Devmgr.dll |
6.0.6001.22225 |
377,344 |
18-Jul-2008 |
03:20 |
x86 |
|
Dmocx.dll |
6.0.6001.22225 |
42,496 |
18-Jul-2008 |
03:20 |
x86 |
For all supported x64-based versions of Windows Server 2008 and of Windows Vista
|
File name |
File version |
File size |
Date |
Time |
Platform |
|---|---|---|---|---|---|
|
Devmgmt.msc |
Not Applicable |
145,640 |
14-Dec-2007 |
22:01 |
Not Applicable |
|
Devmgr.dll |
6.0.6000.20879 |
506,880 |
18-Jul-2008 |
03:29 |
x64 |
|
Dmocx.dll |
6.0.6000.20879 |
49,664 |
18-Jul-2008 |
03:29 |
x64 |
|
Devmgmt.msc |
Not Applicable |
145,640 |
18-Dec-2007 |
21:40 |
Not Applicable |
|
Devmgr.dll |
6.0.6001.22225 |
496,640 |
18-Jul-2008 |
03:51 |
x64 |
|
Dmocx.dll |
6.0.6001.22225 |
49,664 |
18-Jul-2008 |
03:51 |
x64 |
|
Devmgmt.msc |
Not Applicable |
145,640 |
13-Dec-2007 |
20:25 |
Not Applicable |
|
Devmgr.dll |
6.0.6000.20879 |
377,344 |
18-Jul-2008 |
03:14 |
x86 |
|
Dmocx.dll |
6.0.6000.20879 |
42,496 |
18-Jul-2008 |
03:14 |
x86 |
|
Devmgmt.msc |
Not Applicable |
145,640 |
18-Dec-2007 |
21:40 |
Not Applicable |
|
Devmgr.dll |
6.0.6001.22225 |
377,344 |
18-Jul-2008 |
03:20 |
x86 |
|
Dmocx.dll |
6.0.6001.22225 |
42,496 |
18-Jul-2008 |
03:20 |
x86 |
For all supported Itanium-based versions of Windows Server 2008
|
File name |
File version |
File size |
Date |
Time |
Platform |
|---|---|---|---|---|---|
|
Devmgmt.msc |
Not Applicable |
145,640 |
18-Dec-2007 |
21:40 |
Not Applicable |
|
Devmgr.dll |
6.0.6001.22225 |
786,432 |
18-Jul-2008 |
03:27 |
IA-64 |
|
Dmocx.dll |
6.0.6001.22225 |
84,480 |
18-Jul-2008 |
03:27 |
IA-64 |
|
Devmgmt.msc |
Not Applicable |
145,640 |
18-Dec-2007 |
21:40 |
Not Applicable |
|
Devmgr.dll |
6.0.6001.22225 |
377,344 |
18-Jul-2008 |
03:20 |
x86 |
|
Dmocx.dll |
6.0.6001.22225 |
42,496 |
18-Jul-2008 |
03:20 |
x86 |
Additional file information for Windows Server 2008 and Windows Vista
Additional files for all supported x86-based versions of Windows Server 2008 and of Windows Vista
|
File name |
Package_1_for_kb955557~31bf3856ad364e35~x86~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
1,951 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_2_for_kb955557~31bf3856ad364e35~x86~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
1,789 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_3_for_kb955557~31bf3856ad364e35~x86~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
1,789 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_for_kb955557_client_0~31bf3856ad364e35~x86~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
1,425 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_for_kb955557_client_1~31bf3856ad364e35~x86~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
1,367 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_for_kb955557_client~31bf3856ad364e35~x86~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
1,711 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_for_kb955557_server_0~31bf3856ad364e35~x86~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
1,425 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_for_kb955557_server~31bf3856ad364e35~x86~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
1,430 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Update.mum |
|
File version |
Not Applicable |
|
File size |
2,084 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
X86_339b9b9098f999c1c124f7234c4c120d_31bf3856ad364e35_6.0.6001.22225_none_ff0a564c4f19d385.manifest |
|
File version |
Not Applicable |
|
File size |
704 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
X86_d5b6911f37de5983f8961d2a7b7a5f57_31bf3856ad364e35_6.0.6000.20879_none_f6f96135f504f644.manifest |
|
File version |
Not Applicable |
|
File size |
704 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
X86_microsoft-windows-pnpdevicemanager_31bf3856ad364e35_6.0.6000.20879_none_12374da33ba86c53.manifest |
|
File version |
Not Applicable |
|
File size |
37,527 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
03:35 |
|
Platform |
Not Applicable |
|
File name |
X86_microsoft-windows-pnpdevicemanager_31bf3856ad364e35_6.0.6001.22225_none_144f9abd38aa0c33.manifest |
|
File version |
Not Applicable |
|
File size |
37,527 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
04:37 |
|
Platform |
Not Applicable |
Additional files for all supported x64-based versions of Windows Server 2008 and Windows Vista
|
File name |
Amd64_046bba532c39818ba7f13f19fb4b7264_31bf3856ad364e35_6.0.6000.20879_none_99db11af04900d49.manifest |
|
File version |
Not Applicable |
|
File size |
1,056 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Amd64_8b528901260c622b53c76628469583da_31bf3856ad364e35_6.0.6001.22225_none_364dd390f9b21855.manifest |
|
File version |
Not Applicable |
|
File size |
1,056 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Amd64_microsoft-windows-pnpdevicemanager_31bf3856ad364e35_6.0.6000.20879_none_6e55e926f405dd89.manifest |
|
File version |
Not Applicable |
|
File size |
37,573 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
04:54 |
|
Platform |
Not Applicable |
|
File name |
Amd64_microsoft-windows-pnpdevicemanager_31bf3856ad364e35_6.0.6001.22225_none_706e3640f1077d69.manifest |
|
File version |
Not Applicable |
|
File size |
37,573 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
06:47 |
|
Platform |
Not Applicable |
|
File name |
Package_1_for_kb955557~31bf3856ad364e35~amd64~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
2,185 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_2_for_kb955557~31bf3856ad364e35~amd64~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
2,021 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_3_for_kb955557~31bf3856ad364e35~amd64~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
2,021 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_for_kb955557_client_0~31bf3856ad364e35~amd64~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
1,433 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_for_kb955557_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
1,375 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_for_kb955557_client~31bf3856ad364e35~amd64~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
1,721 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_for_kb955557_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
1,433 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_for_kb955557_server~31bf3856ad364e35~amd64~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
1,438 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Update.mum |
|
File version |
Not Applicable |
|
File size |
2,098 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
X86_microsoft-windows-pnpdevicemanager_31bf3856ad364e35_6.0.6000.20879_none_12374da33ba86c53.manifest |
|
File version |
Not Applicable |
|
File size |
37,527 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
03:35 |
|
Platform |
Not Applicable |
|
File name |
X86_microsoft-windows-pnpdevicemanager_31bf3856ad364e35_6.0.6001.22225_none_144f9abd38aa0c33.manifest |
|
File version |
Not Applicable |
|
File size |
37,527 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
04:37 |
|
Platform |
Not Applicable |
Additional files for all supported Itanium-based versions of Windows Server 2008
|
File name |
Ia64_7695229ec5e1c6a16a4e4a3679038e1c_31bf3856ad364e35_6.0.6001.22225_none_ccef9272042353a1.manifest |
|
File version |
Not Applicable |
|
File size |
1,054 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Ia64_microsoft-windows-pnpdevicemanager_31bf3856ad364e35_6.0.6001.22225_none_14513eb338a8152f.manifest |
|
File version |
Not Applicable |
|
File size |
37,550 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
05:13 |
|
Platform |
Not Applicable |
|
File name |
Package_1_for_kb955557~31bf3856ad364e35~ia64~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
2,016 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_for_kb955557_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
1,429 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Package_for_kb955557_server~31bf3856ad364e35~ia64~~6.0.1.0.mum |
|
File version |
Not Applicable |
|
File size |
1,434 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
Update.mum |
|
File version |
Not Applicable |
|
File size |
1,425 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
21:18 |
|
Platform |
Not Applicable |
|
File name |
X86_microsoft-windows-pnpdevicemanager_31bf3856ad364e35_6.0.6001.22225_none_144f9abd38aa0c33.manifest |
|
File version |
Not Applicable |
|
File size |
37,527 |
|
Date (UTC) |
18-Jul-2008 |
|
Time (UTC) |
04:37 |
|
Platform |
Not Applicable |
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More Information
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
