Bah, I don't have Reporting Services installed. Will check that.
This is the log after I set up a 22h maintenance window (just to test):
This is a one shot Service Window that has already finished. ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration for the Service Window is Total days: 0, hours: 00, mins: 00, secs: 00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Populating instance of ServiceWindow with ID=90a5f436-364c-48c7-8dc7-c5014abcbea8, ScheduleString=001A8A8028592000, Type=6 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
StartTime is 09/02/12 00:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration for the Service Window is Total days: 1, hours: 05, mins: 00, secs: 00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Populating instance of ServiceWindow with ID=45dca355-3249-4845-b8aa-72d0e604548e, ScheduleString=02D78A80381C2000, Type=6 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
StartTime is 09/05/12 22:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration for the Service Window is Total days: 0, hours: 07, mins: 00, secs: 00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Populating instance of ServiceWindow with ID=87e4759c-2884-45e6-9261-c33ba53f596c, ScheduleString=02D78A80101D2000, Type=6 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
StartTime is 09/06/12 22:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration for the Service Window is Total days: 0, hours: 02, mins: 00, secs: 00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Populating instance of ServiceWindow with ID=36da6950-3d1e-4027-be0e-7b16a4daee7e, ScheduleString=00188A80005E2000, Type=6 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
StartTime is 08/31/12 00:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration for the Service Window is Total days: 1, hours: 00, mins: 00, secs: 00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Populating instance of ServiceWindow with ID=028bfbc0-7120-4081-a268-0e664a92ac4a, ScheduleString=00198A80005F2000, Type=6 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
StartTime is 09/01/12 00:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration for the Service Window is Total days: 1, hours: 00, mins: 00, secs: 00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Populating instance of ServiceWindow with ID=49fd80be-ac4b-4877-974d-ecd09958926d, ScheduleString=02D78A80381B2000, Type=6 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
StartTime is 09/04/12 22:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration for the Service Window is Total days: 0, hours: 07, mins: 00, secs: 00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Populating instance of ServiceWindow with ID=ad27b0ca-8c74-43c7-8200-1f601880bd75, ScheduleString=02D78A80381A2000, Type=6 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
StartTime is 09/03/12 22:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration for the Service Window is Total days: 0, hours: 07, mins: 00, secs: 00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Populating instance of ServiceWindow with ID={9A9B5EAF-14CD-4791-AF3D-FC5A892E86DB}, ScheduleString=003F8A80B0100009, Type=1 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
StartTime is 08/31/12 03:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration for the Service Window is Total days: 0, hours: 22, mins: 00, secs: 00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Checking to see which Service Windows should be Active..... ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Sending Message SERVICEWINDOWEVENT:START event ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Sending Message SERVICEWINDOWEVENT:START event ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Checking Service Windows to find Next Event..... ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Next Event Time is at 09/01/12 00:00:00. Service Window with ID:36da6950-3d1e-4027-be0e-7b16a4daee7e. Is the next event the beginning of the window? No ServiceWindowManager 31.08.2012 17:12:57
4204 (0x106C)
Inactive Service Windows List has 7 windows ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Service Window with ID = 7cb56688-692f-4fae-b398-0e3ff4413adb having Starttime=01/01/38 00:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration is 0 days, 00 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Service Window with ID = 90a5f436-364c-48c7-8dc7-c5014abcbea8 having Starttime=09/02/12 00:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration is 1 days, 05 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Service Window with ID = 45dca355-3249-4845-b8aa-72d0e604548e having Starttime=09/05/12 22:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration is 0 days, 07 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Service Window with ID = 87e4759c-2884-45e6-9261-c33ba53f596c having Starttime=09/06/12 22:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration is 0 days, 02 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Service Window with ID = 028bfbc0-7120-4081-a268-0e664a92ac4a having Starttime=09/01/12 00:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration is 1 days, 00 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Service Window with ID = 49fd80be-ac4b-4877-974d-ecd09958926d having Starttime=09/04/12 22:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration is 0 days, 07 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Service Window with ID = ad27b0ca-8c74-43c7-8200-1f601880bd75 having Starttime=09/03/12 22:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration is 0 days, 07 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Active Service Windows List has 2 windows ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Service Window with ID = 36da6950-3d1e-4027-be0e-7b16a4daee7e having Starttime=08/31/12 00:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration is 1 days, 00 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Service Window with ID = {9A9B5EAF-14CD-4791-AF3D-FC5A892E86DB} having Starttime=08/31/12 03:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration is 0 days, 22 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Scheduling the Timer Task ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Scheduled the timer to fire on 09/01/12 00:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
OnIsServiceWindowAvailable called with: Runtime:1, Type:3 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
No Service Windows exist for this type. Will check if the program can run in the All Programs window... ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Biggest Active Service Window has ID = {9A9B5EAF-14CD-4791-AF3D-FC5A892E86DB} having Starttime=08/31/12 03:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration is 0 days, 22 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
ActiveServiceWindow has 28023 seconds left ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Program can run! Setting *canProgramRun to TRUE ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
OnIsServiceWindowAvailable called with: Runtime:1, Type:3 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
No Service Windows exist for this type. Will check if the program can run in the All Programs window... ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Biggest Active Service Window has ID = {9A9B5EAF-14CD-4791-AF3D-FC5A892E86DB} having Starttime=08/31/12 03:00:00 ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Duration is 0 days, 22 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
ActiveServiceWindow has 28023 seconds left ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
Program can run! Setting *canProgramRun to TRUE ServiceWindowManager 31.08.2012 17:12:57 4204 (0x106C)
OnIsServiceWindowAvailable called with: Runtime:1, Type:4 ServiceWindowManager 31.08.2012 17:13:01 4208 (0x1070)
No Service Windows exist for this type. Will check if the program can run in the All Programs window... ServiceWindowManager 31.08.2012 17:13:01 4208 (0x1070)
Biggest Active Service Window has ID = {9A9B5EAF-14CD-4791-AF3D-FC5A892E86DB} having Starttime=08/31/12 03:00:00 ServiceWindowManager 31.08.2012 17:13:01 4208 (0x1070)
Duration is 0 days, 22 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:13:01 4208 (0x1070)
ActiveServiceWindow has 28019 seconds left ServiceWindowManager 31.08.2012 17:13:01 4208 (0x1070)
Program can run! Setting *canProgramRun to TRUE ServiceWindowManager 31.08.2012 17:13:01 4208 (0x1070)
OnIsServiceWindowAvailable called with: Runtime:1, Type:6 ServiceWindowManager 31.08.2012 17:13:01 4208 (0x1070)
Biggest Active Service Window has ID = 36da6950-3d1e-4027-be0e-7b16a4daee7e having Starttime=08/31/12 00:00:00 ServiceWindowManager 31.08.2012 17:13:01 4208 (0x1070)
Duration is 1 days, 00 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:13:01 4208 (0x1070)
ActiveServiceWindow has 24419 seconds left ServiceWindowManager 31.08.2012 17:13:01 4208 (0x1070)
Program can run! Setting *canProgramRun to TRUE ServiceWindowManager 31.08.2012 17:13:01 4208 (0x1070)
OnIsServiceWindowAvailable called with: Runtime:900, Type:2 ServiceWindowManager 31.08.2012 17:13:03 4204 (0x106C)
No Service Windows exist for this type. Will check if the program can run in the All Programs window... ServiceWindowManager 31.08.2012 17:13:03 4204 (0x106C)
Biggest Active Service Window has ID = {9A9B5EAF-14CD-4791-AF3D-FC5A892E86DB} having Starttime=08/31/12 03:00:00 ServiceWindowManager 31.08.2012 17:13:03 4204 (0x106C)
Duration is 0 days, 22 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:13:03 4204 (0x106C)
ActiveServiceWindow has 28017 seconds left ServiceWindowManager 31.08.2012 17:13:03 4204 (0x106C)
Program can run! Setting *canProgramRun to TRUE ServiceWindowManager 31.08.2012 17:13:03 4204 (0x106C)
OnIsServiceWindowAvailable called with: Runtime:900, Type:2 ServiceWindowManager 31.08.2012 17:13:16 2440 (0x0988)
No Service Windows exist for this type. Will check if the program can run in the All Programs window... ServiceWindowManager 31.08.2012 17:13:16 2440 (0x0988)
Biggest Active Service Window has ID = {9A9B5EAF-14CD-4791-AF3D-FC5A892E86DB} having Starttime=08/31/12 03:00:00 ServiceWindowManager 31.08.2012 17:13:16 2440 (0x0988)
Duration is 0 days, 22 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:13:16 2440 (0x0988)
ActiveServiceWindow has 28004 seconds left ServiceWindowManager 31.08.2012 17:13:16 2440 (0x0988)
Program can run! Setting *canProgramRun to TRUE ServiceWindowManager 31.08.2012 17:13:16 2440 (0x0988)
OnIsServiceWindowAvailable called with: Runtime:900, Type:6 ServiceWindowManager 31.08.2012 17:13:16 2440 (0x0988)
Biggest Active Service Window has ID = 36da6950-3d1e-4027-be0e-7b16a4daee7e having Starttime=08/31/12 00:00:00 ServiceWindowManager 31.08.2012 17:13:16 2440 (0x0988)
Duration is 1 days, 00 hours, 00 mins, 00 secs ServiceWindowManager 31.08.2012 17:13:16 2440 (0x0988)
ActiveServiceWindow has 24404 seconds left ServiceWindowManager 31.08.2012 17:13:16 2440 (0x0988)
Program can run! Setting *canProgramRun to TRUE ServiceWindowManager 31.08.2012 17:13:16 2440 (0x0988)
Service shutdown notification received ServiceWindowManager 31.08.2012 18:57:53 5328 (0x14D0)
Begin Deleting Service Windows... ServiceWindowManager 31.08.2012 18:57:53 5328 (0x14D0)
Sending Message SERVICEWINDOWEVENT:END event ServiceWindowManager 31.08.2012 18:57:53 5328 (0x14D0)
Sending Message SERVICEWINDOWEVENT:END event ServiceWindowManager 31.08.2012 18:57:53 5328 (0x14D0)
Deleted All Service Windows... ServiceWindowManager 31.08.2012 18:57:53 5328 (0x14D0)
OnIsServiceWindowAvailable called with: Runtime:1, Type:6 ServiceWindowManager 31.08.2012 18:57:54 4296 (0x10C8)
Biggest Active Service Window for Type=6 not found ServiceWindowManager 31.08.2012 18:57:54 4296 (0x10C8)
Program cannot Run! Setting *canProgramRun to FALSE ServiceWindowManager 31.08.2012 18:57:54 4296 (0x10C8)
WillProgramRun called with: Runtime:1, Type:6 ServiceWindowManager 31.08.2012 18:57:54 4296 (0x10C8)
A Service Window of this type exists. ServiceWindowManager 31.08.2012 18:57:54 4296 (0x10C8)
There exists a Service Window of this Type, for this duration. The Program will run eventually. ServiceWindowManager 31.08.2012 18:57:54 4296 (0x10C8)
ServiceWindowManager 31.08.2012 18:57:54 4296 (0x10C8)
OnIsServiceWindowAvailable called with: Runtime:1, Type:6 ServiceWindowManager 31.08.2012 18:57:54 3444 (0x0D74)
Biggest Active Service Window for Type=6 not found ServiceWindowManager 31.08.2012 18:57:54 3444 (0x0D74)
Program cannot Run! Setting *canProgramRun to FALSE ServiceWindowManager 31.08.2012 18:57:54 3444 (0x0D74)
WillProgramRun called with: Runtime:1, Type:6 ServiceWindowManager 31.08.2012 18:57:54 3444 (0x0D74)
A Service Window of this type exists. ServiceWindowManager 31.08.2012 18:57:54 3444 (0x0D74)
There exists a Service Window of this Type, for this duration. The Program will run eventually. ServiceWindowManager 31.08.2012 18:57:54 3444 (0x0D74)
ServiceWindowManager 31.08.2012 18:57:54 3444 (0x0D74)
ServiceWindowManager::FinalConstruct entered ServiceWindowManager 31.08.2012 19:01:32 2072 (0x0818)
Initializing Creation of ServiceWindowHandler ServiceWindowManager 31.08.2012 19:01:32 2072 (0x0818)
ServiceWindowHandler::Successfully registered for Time Change Events ServiceWindowManager 31.08.2012 19:01:32 2072 (0x0818)
ServiceWindowManager 31.08.2012 19:01:32 2072 (0x0818)
Refreshing Service Windows..... ServiceWindowManager 31.08.2012 19:01:32 2072 (0x0818)
Populating instance of ServiceWindow with ID=7cb56688-692f-4fae-b398-0e3ff4413adb, ScheduleString=02D78A80381A200002D78A80381B200002D78A80381C200002D78A80381D2000, Type=6 ServiceWindowManager 31.08.2012
19:01:32 2072 (0x0818)
CServiceWindow::CServiceWindow: Failed to initialize ServiceWindowSchedule instance from schedule string (02D78A80381A200002D78A80381B200002D78A80381C200002D78A80381D2000) ServiceWindowManager 31.08.2012 19:01:32
2072 (0x0818)
This is a one shot Service Window that has already finished. ServiceWindowManager 31.08.2012 19:01:32 2072 (0x0818)
Duration for the Service Window is Total days: 0, hours: 00, mins: 00, secs: 00 ServiceWindowManager 31.08.2012 19:01:32 2072 (0x0818)
Populating instance of ServiceWindow with ID=90a5f436-364c-48c7-8dc7-c5014abcbea8, ScheduleString=001A8A8028592000, Type=6 ServiceWindowManager 31.08.2012 19:01:32 2072 (0x0818)
StartTime is 09/02/12 00:00:00 ServiceWindowManager 31.08.2012 19:01:32 2072 (0x0818)
Duration for the Service Window is Total days: 1, hours: 05, mins: 00, secs: 00 ServiceWindowManager 31.08.2012 19:01:32 2072 (0x0818)
Populating instance of ServiceWindow with ID=45dca355-3249-4845-b8aa-72d0e604548e, ScheduleString=02D78A80381C2000, Type=6 ServiceWindowManager 31.08.2012 19:01:32 2072 (0x0818)
StartTime is 09/05/12 22:00:00 ServiceWindowManager 31.08.2012 19:01:32 2072 (0x0818)
Duration for the Service Window is Total