It should still be in the control panel, I have Win 98SE on an older laptop and it's there...
Anyways, you can still disable it by double clicking on the icon in the taskbar, which should bring up the scheduled tasks window. Click advanced, and then click "stop using task scheduler."
It can be enabled anytime by going through the control panel procedure I have posted above, except it should say "start" as opposed to "stop".
Intel C2D E6320 / AMD Athlon X2 3800+
Gigabyte 965P DS3 / DFI nF4 Ultra-D
2GB OCZ Gold PC2-6400 / 2GB OCZ Gold PC4000
eVGA 8800GTS 320MB / eVGA 6800GS 256MB
150GB Raptor / 74GB Raptor
2x500GB / 320GB
OCZ GameXStreme 850w / OCZ StealthXStream 600w