You need a new computer. ;]
Does this registry key exist?
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Schedule
If not, here you can try pasting this into a .reg file and merging it. This
is exported from a Windows 2000 Server SP3 here where I am.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Schedule]
"Description"="Enables a program to run at a designated time."
"Type"=dword:00000120
"Start"=dword:00000002
"ErrorControl"=dword:00000001
"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,00,4d,\
00,53,00,54,00,61,00,73,00,6b,00,2e,00,65,00,78,00,65,00,00,00
"DisplayName"="Task Scheduler"
"DependOnService"=hex(7):52,00,70,00,63,00,53,00,73,00,00,00,00,00
"DependOnGroup"=hex(7):00,00
"ObjectName"="LocalSystem"
"NextAtJobId"=dword:00000006
"AtTaskMaxHours"=dword:00000048
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Schedule\Security]
"Security"=hex:01,00,14,80,a8,00,00,00,b4,00,00,00,14,00,00,00,30,00,00,00,0
2,\
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,\
00,00,02,00,78,00,05,00,00,00,00,00,14,00,8d,01,02,00,01,01,00,00,00,00,00,\
05,0b,00,00,00,00,00,18,00,9d,01,02,00,01,02,00,00,00,00,00,05,20,00,00,00,\
23,02,00,00,00,00,18,00,ff,01,0f,00,01,02,00,00,00,00,00,05,20,00,00,00,20,\
02,00,00,00,00,18,00,ff,01,0f,00,01,02,00,00,00,00,00,05,20,00,00,00,25,02,\
00,00,00,00,14,00,fd,01,02,00,01,01,00,00,00,00,00,05,12,00,00,00,01,01,00,\
00,00,00,00,05,12,00,00,00,01,01,00,00,00,00,00,05,12,00,00,00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Schedule\Enum]
"0"="Root\\LEGACY_SCHEDULE\\0000"
"Count"=dword:00000001
"NextInstance"=dword:00000001
Ray at work