Microsoft KB Archive/939815

= You may experience slow system performance when you view multipage .tiff files in Windows Live Photo Gallery =

Article ID: 939815

Article Last Modified on 9/27/2007

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APPLIES TO


 * Windows Live Gallery
 * Windows Vista Enterprise 64-bit Edition
 * Windows Vista Home Basic 64-bit Edition
 * Windows Vista Home Premium 64-bit Edition
 * Windows Vista Ultimate 64-bit Edition
 * Windows Vista Business
 * Windows Vista Business 64-bit Edition
 * Windows Vista Enterprise
 * Windows Vista Home Basic
 * Windows Vista Home Premium
 * Windows Vista Ultimate
 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Service Pack 2

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Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry



SYMPTOMS
You may experience slow system performance when you view multipage .tiff files in Windows Live Photo Gallery. Additionally, the memory usage increases significantly.



CAUSE
After Windows Live Photo Gallery finishes rendering the first of several images on the screen, it immediately starts to load the next image. This process is known as precaching. If an image is a multipage .tiff file, Windows Live Photo Gallery processes the complete file. This process may take awhile, depending on the size of the .tiff file. An issue with how precaching is implemented causes lots of system resources to be used. This behavior causes the symptoms that are described in the &quot;Symptoms&quot; section.



RESOLUTION
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 the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

Disable precaching in Windows Live Photo Gallery to resolve this issue.

Note When precaching is disabled, it takes longer than before to move through the images in Windows Live Photo Gallery. But you do not experience the symptoms that are described in the &quot;Symptoms&quot; section.

To disable precaching in Windows Live Photo Gallery for Windows Vista, follow these steps:  Click Start, and then type regedit in the Start Search box.

If you are prompted for an administrator password or for a confirmation, type the password, or click Allow.

 Locate and then click the following registry subkey: . Click Edit, point to New, and then click DWORD (32-bit) Value. In the New Value #1 box, type CacheSize, and then press ENTER. Right-click CacheSize, and then click Modify. In the Value data box, type 0, and then click OK.</li> Close Registry Editor.</li></ol>

To disable precaching in Windows Live Photo Gallery for Windows XP, follow these steps:
 * 1) Click Start, click Run, and then type regedit.
 * 2) Locate and then click the following registry subkey:.
 * 3) Click Edit, point to New, and then click DWORD Value.
 * 4) In the New Value #1 box, type CacheSize, and then press ENTER.
 * 5) Right-click CacheSize, and then click Modify.
 * 6) In the Value data box, type 0, and then click OK.
 * 7) Close Registry Editor.

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Keywords: kbhowto kbwinliveportal KB939815

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