www.BlackViper.com: Windows 7 Services 411 - Multimedia Class Scheduler

Multimedia Class Scheduler

Default Description:

Enables relative prioritization of work based on system-wide task priorities. This is intended mainly for multimedia applications. If this service is stopped, individual tasks resort to their default priority.

Additional Information:

This service is required only for the fact that Windows Audio service lists this as a dependency. Without the Windows Audio service, no audio will be played on the system. This service is started upon system boot, but shortly after (~ 8 minutes), it stops. A nice change from Windows Vista.

Additional Reading:

• None at this time

Discussion Topic Link:

Windows 7 Services Forum

Defaults Startup Type:

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

Other Settings:

Safe Setting: Automatic

Service Names:

Service Name (registry): MMCSS

Display Name: Multimedia Class Scheduler

Default Path and Command Line Options:

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

Log On As:

Account: Local System account

Dependencies:

What service Multimedia Class Scheduler needs to function properly:

• None (S, HB, HP, P, U, E)

What other service require Multimedia Class Scheduler to function properly:

• Windows Audio (S, HB, HP, P, U, E)

Registry Settings (.reg):

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\MMCSS]
"DisplayName"="@%systemroot%\\system32\\mmcss.dll,-100"
"ImagePath"=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,00,73,00,79,00,73,00,74,00,65,00,6d,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\\mmcss.dll,-101"
"ObjectName"="LocalSystem"
"ErrorControl"=dword:00000001
"Start"=dword:00000002
"Type"=dword:00000020
"ServiceSidType"=dword:00000001
"RequiredPrivileges"=hex(7):53,00,65,00,49,00,6e,00,63,00,72,00,65,00,61,00,73,\
00,65,00,42,00,61,00,73,00,65,00,50,00,72,00,69,00,6f,00,72,00,69,00,74,00,\
79,00,50,00,72,00,69,00,76,00,69,00,6c,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,c0,d4,01,00,01,00,00,00,e0,93,04,00,00,00,00,00,00,00,00,00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\MMCSS\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,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,\
6d,00,6d,00,63,00,73,00,73,00,2e,00,64,00,6c,00,6c,00,00,00
"ServiceMain"="ServiceMain"
"ServiceDllUnloadOnStop"=dword:00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\MMCSS\Security]
"Security"=hex:01,00,14,80,a4,00,00,00,b0,00,00,00,14,00,00,00,30,00,00,00,02,\
00,1c,00,01,00,00,00,02,80,14,00,ff,01,0f,00,01,01,00,00,00,00,00,01,00,00,\
00,00,02,00,74,00,05,00,00,00,00,00,14,00,fd,01,02,00,01,01,00,00,00,00,00,\
05,12,00,00,00,00,00,18,00,ff,01,0f,00,01,02,00,00,00,00,00,05,20,00,00,00,\
20,02,00,00,00,00,14,00,8d,01,02,00,01,01,00,00,00,00,00,05,04,00,00,00,00,\
00,14,00,8d,01,02,00,01,01,00,00,00,00,00,05,06,00,00,00,00,00,18,00,10,00,\
00,00,01,02,00,00,00,00,00,05,20,00,00,00,21,02,00,00,01,01,00,00,00,00,00,\
05,12,00,00,00,01,01,00,00,00,00,00,05,12,00,00,00