When you try to install a new hardware device on a Windows Vista-based computer, Windows Vista cannot install the driver for the hardware device successfully. Additionally, you may sometimes receive the following error message: This problem occurs if the Infcache.1 file that is in the %Windir%\System32 folder is deleted or corrupted.

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If the Infcache.1 file is deleted or corrupted, Windows Vista does not re-create the Infcache.1 file.

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Service pack information

To resolve this problem, obtain the latest service pack for Windows Vista. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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Update information

Windows Vista

http://www.microsoft.com/downloads/details.aspx?FamilyId=51F0EF25-280B-4613-A600-C61224BACD1C (http://www.microsoft.com/downloads/details.aspx?FamilyId=51F0EF25-280B-4613-A600-C61224BACD1C)

Windows Vista x64-based System

http://www.microsoft.com/downloads/details.aspx?FamilyId=1FD9BBC8-624E-442D-A36A-169C4B942BEF (http://www.microsoft.com/downloads/details.aspx?FamilyId=1FD9BBC8-624E-442D-A36A-169C4B942BEF)

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Hotfix information

A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

No prerequisites are required.

Restart requirement

You must restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix replaces hotfix 937187.

Registry information

You do not have to make any changes to the registry to use the hotfix in this package.

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, x86-based versions

File name	File version	File size	Date	Time	Platform
Update-bf.mum	Not Applicable	1,954	19-Jul-2007	13:53	Not Applicable
Update.mum	Not Applicable	2,667	19-Jul-2007	13:48	Not Applicable
X86_593ac4da77f9d4003cb0f4c01c752093_31bf3856ad364e35_6.0.6000.20643_none_2be7720fdb7b67fc.manifest	Not Applicable	696	19-Jul-2007	13:48	Not Applicable
X86_e22b4fa6179c49161db3bd2ccaf77ee3_31bf3856ad364e35_6.0.6000.16527_none_09fc547047c60b2e.manifest	Not Applicable	696	19-Jul-2007	13:48	Not Applicable
X86_microsoft-windows-setupapi_31bf3856ad364e35_6.0.6000.16527_none_33007b52c9213580.manifest	Not Applicable	19,532	19-Jul-2007	13:53	Not Applicable
X86_microsoft-windows-setupapi_31bf3856ad364e35_6.0.6000.20643_none_3370771de252a7d0.manifest	Not Applicable	19,532	19-Jul-2007	13:53	Not Applicable
Setupapi.dll	6.0.6000.16527	1,585,152	19-Jul-2007	02:22	x86
Setupapi.mof	Not Applicable	3,689	07-Jan-2007	05:50	Not Applicable
Setupapi.dll	6.0.6000.20643	1,585,152	19-Jul-2007	02:15	x86
Setupapi.mof	Not Applicable	3,689	07-Jan-2007	05:50	Not Applicable

Windows Vista, x64-based versions

File name	File version	File size	Date	Time	Platform
Amd64_593ac4da77f9d4003cb0f4c01c752093_31bf3856ad364e35_6.0.6000.20643_none_88060d9393d8d932.manifest	Not Applicable	698	19-Jul-2007	13:48	Not Applicable
Amd64_91fa1c4ffaca15db2abf9dcb272299f0_31bf3856ad364e35_6.0.6000.16527_none_2bc446013911998a.manifest	Not Applicable	700	19-Jul-2007	13:48	Not Applicable
Amd64_c07fa7bd4123e69fdda5dbd1f010141b_31bf3856ad364e35_6.0.6000.20643_none_c6190a584a1226f2.manifest	Not Applicable	700	19-Jul-2007	13:48	Not Applicable
Amd64_e22b4fa6179c49161db3bd2ccaf77ee3_31bf3856ad364e35_6.0.6000.16527_none_661aeff400237c64.manifest	Not Applicable	698	19-Jul-2007	13:48	Not Applicable
Amd64_microsoft-windows-setupapi_31bf3856ad364e35_6.0.6000.16527_none_8f1f16d6817ea6b6.manifest	Not Applicable	19,588	19-Jul-2007	13:56	Not Applicable
Amd64_microsoft-windows-setupapi_31bf3856ad364e35_6.0.6000.20643_none_8f8f12a19ab01906.manifest	Not Applicable	19,588	19-Jul-2007	13:56	Not Applicable
Package_1_for_kb940199_bf~31bf3856ad364e35~amd64~~6.0.1.0.mum	Not Applicable	1,753	19-Jul-2007	13:53	Not Applicable
Package_1_for_kb940199~31bf3856ad364e35~amd64~~6.0.1.0.mum	Not Applicable	3,621	19-Jul-2007	13:48	Not Applicable
Package_2_for_kb940199_bf~31bf3856ad364e35~amd64~~6.0.1.0.mum	Not Applicable	1,968	19-Jul-2007	13:53	Not Applicable
Package_2_for_kb940199~31bf3856ad364e35~amd64~~6.0.1.0.mum	Not Applicable	3,842	19-Jul-2007	13:48	Not Applicable
Update-bf.mum	Not applicable	1,890	19-Jul-2007	13:53	Not applicable
Update.mum	Not applicable	1,925	19-Jul-2007	13:48	Not applicable
Setupapi.dll	6.0.6000.16527	1,937,408	19-Jul-2007	03:25	x64
Setupapi.mof	Not applicable	3,689	07-Jan-2007	05:56	Not applicable
Setupapi.dll	6.0.6000.20643	1,936,896	19-Jul-2007	03:17	x64
Setupapi.mof	Not applicable	3,689	07-Jan-2007	05:50	Not applicable

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Vista Service Pack 1.

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Some third-party software programs may delete the Infcache.1 file by using the method that is described in Microsoft Knowledge Base article 830552. However, this method must not be used on Windows Vista-based computers. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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