[andrewjw]

Just do that in the task manager

[voltagex_]

Wasn't an option until Windows 10, I think. autoruns from SysInternals is my go-to.

[nikbackm]

There's also "msconfig", present in Windows 7.

[Yizahi]

And XP and 2000 and maybe earlier versions too

[astura]

msconfig has been around since at least XP.

[digi_owl]

There are also a similar tool from Nirsoft.