www.BlackViper.com: Windows 7 Services 411 - Application Experience

Application Experience

Default Description:

Processes application compatibility cache requests for applications as they are launched.

Additional Information:

This service is started upon system boot, but shortly after, it stops if not used.

This service checks a Microsoft maintained database for known problems with popular programs and automatically enables workarounds, either at first installation (using UAC) or at application launch.

Currently, as reported in this thread:

http://bbs.blackviper.com/index.php/topic,1679.0.html

A bug may exist with this service disabled. The action I was able to duplicate is:

1. Make a .zip file on the desktop
2. Extract that same .zip file on the desktop
3. Navigate into the extracted folder
4. Close the resulting explorer windows
5. Delete the file

A "permission denied" error results and even when allowing it to continue (or giving permission to delete the file), the action fails. This situation does not happen with Windows Vista (that I have been able to recreate).

Older "non-Vista or Windows 7 compatible" programs may need this service running. Turning off this feature may increase over all application responsiveness at launch time (due to avoiding the database lookup), however, it will not fix application installation issues. As such, if this service and Group Policy is modified, I highly recommend to ensure that all of your software is updated to the latest version as well as be Windows 7 compatible along with proper architecture (32 or 64-bit).

You can also configure this behavior system wide using the Group Policy Editor (gpedit.msc) which is available on Windows 7 Ultimate.

Group Policy Editor is launched from the "Run" box located in Start Menu -> All Programs -> Accessories -> Run -> gpedit.msc

The settings are located in:

Local Computer Policy -> Computer Configuration -> Administrative Templates -> Windows Components -> Application Compatibility

• Select Turn Off Application Compatibility Engine
• Select Enabled under the Settings tab
• Select Turn off Program Compatibility Assistant
• Select Enabled under the Settings tab

The settings listed above are system wide and will affect all users/accounts. As of May 11, 2009, I have both settings "Enabled," which turns off the stated functionality. This also turns off "Compatibility Mode." As such, if you use compatibility mode, you should leave these settings at the default setting.

Additional Reading:

• Application Experience: http://support.microsoft.com/kb/902196

Discussion Topic Link:

Windows 7 Services Forum

Defaults Startup Type:

Windows 7 Starter: Manual (Started)
Windows 7 Home Basic: Manual (Started)
Windows 7 Home Premium: Manual (Started)
Windows 7 Professional: Manual (Started)
Windows 7 Ultimate: Manual (Started)
Windows 7 Enterprise: Manual (Started)

Other Settings:

Safe Setting: Manual

Service Names:

Service Name (registry): AeLookupSvc

Display Name: Application Experience

Default Path and Command Line Options:

C:\Windows\system32\svchost.exe -k netsvcs

Log On As:

Account: Local System account

Dependencies:

What service Application Experience needs to function properly:

• None (S, HB, HP, P, U, E)

What other service require Application Experience to function properly:

• None (S, HB, HP, P, U, E)

Registry Settings (.reg):

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\AeLookupSvc]
"DisplayName"="@%SystemRoot%\\system32\\aelupsvc.dll,-1"
"ImagePath"=hex(2):25,00,73,00,79,00,73,00,74,00,65,00,6d,00,72,00,6f,00,6f,00,\
74,00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,\
00,76,00,63,00,68,00,6f,00,73,00,74,00,2e,00,65,00,78,00,65,00,20,00,2d,00,\
6b,00,20,00,6e,00,65,00,74,00,73,00,76,00,63,00,73,00,00,00
"Description"="@%SystemRoot%\\system32\\aelupsvc.dll,-2"
"ObjectName"="localSystem"
"ErrorControl"=dword:00000001
"Start"=dword:00000003
"Type"=dword:00000020
"RequiredPrivileges"=hex(7):53,00,65,00,54,00,63,00,62,00,50,00,72,00,69,00,76,\
00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,49,00,6d,00,70,00,65,00,\
72,00,73,00,6f,00,6e,00,61,00,74,00,65,00,50,00,72,00,69,00,76,00,69,00,6c,\
00,65,00,67,00,65,00,00,00,00,00
"FailureActions"=hex:80,51,01,00,00,00,00,00,00,00,00,00,03,00,00,00,14,00,00,\
00,01,00,00,00,60,ea,00,00,01,00,00,00,60,ea,00,00,00,00,00,00,00,00,00,00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\AeLookupSvc\Parameters]
"ServiceDll"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,\
00,74,00,25,00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,\
61,00,65,00,6c,00,75,00,70,00,73,00,76,00,63,00,2e,00,64,00,6c,00,6c,00,00,\
00
"ServiceDllUnloadOnStop"=dword:00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\AeLookupSvc\TriggerInfo]

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\AeLookupSvc\TriggerInfo\0]
"Type"=dword:00000014
"Action"=dword:00000001
"GUID"=hex:fd,a5,f4,18,3b,fd,a5,40,8f,c2,e5,d2,61,c5,d0,2e