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Method for preventing users from compressing files
Article ID: 328597 - View products that this article applies to.
This article was previously published under Q328597
You might want to prevent users from putting compressed files on a file server. You might want to do this because of the CPU power that is used to compress and uncompress the files, or to help predict the backup space that you will need.
You cannot completely prevent users from putting compressed files on a file server by disabling compression on the file server. For example, Microsoft Windows XP and Microsoft Windows Server 2003 do not have a file system setting to disable compression. The setting that is described in this hotfix article can cause problems with programs that expect compression to be available on a volume that uses the NTFS file system.
The hotfix that is described in this article provides a method to disable compression on a per-program basis on a client computer. The support for this method is built into the Application Compatibility layer. One way to deploy this method is by using computer Group Policy objects (GPOs).
Service pack informationTo resolve this problem, obtain the latest service pack for Windows XP. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322389/ )How to obtain the latest Windows XP service pack
Hotfix informationA 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. The English version of this fix 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.
Date Time Version Size File name Platform SP --------------------------------------------------------------------------- 31-Dec-2002 00:28 5.1.2600.108 1,801,728 Acgenral.dll x86 none 20-Dec-2002 19:11 1,055,610 Sysmain.sdb x86 none 31-Dec-2002 01:16 5.1.2600.1152 1,821,696 Acgenral.dll x86 1 19-Dec-2002 22:42 1,086,000 Sysmain.sdb x86 1 16-Dec-2002 22:58 5.1.2600.108 1,801,728 Wacgenral.dll IA64 none 20-Dec-2002 19:11 1,055,610 Wsysmain.sdb IA64 none 18-Dec-2002 19:28 5.1.2600.1152 1,821,696 Wacgenral.dll IA64 1 19-Dec-2002 22:42 1,086,000 Wsysmain.sdb IA64 1
Microsoft has confirmed that this is a bug in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Microsoft Windows XP Service Pack 2.
Note You must configure this hotfix on a per-program basis. Explorer.exe is only an example.
Programs such as Explorer.exe call the GetVolumeInformation function to retrieve information about a volume's capabilities. With this hotfix installed, the Application Compatibility layer can hide some of these options, such as FS_FILE_COMPRESSION or FILE_SUPPORTS_ENCRYPTION.
After you install this hotfix, you can apply Security Database (SDB) files that contain instructions about how to use the layer. Note that the Compatibility Administrator tool is included with the Microsoft Application Compatibility Toolkit. To download the Microsoft Application Compatibility Toolkit, visit the following Microsoft Web site:
http://www.microsoft.com/downloads/details.aspx?FamilyID=24DA89E9-B581-47B0-B45E-492DD6DA2971&displaylang=enTo create an SDB file to prevent compression in Explorer.exe by using Compatibility Administrator, follow these steps:
To deploy SDB files, follow these steps:
Article ID: 328597 - Last Review: April 4, 2007 - Revision: 6.2