Undoubtedly you meant that as a joke, but over and above any humor in
it, I want to caution everyone here to *never* vacuum the inside of a
computer. Doing so can cause static electricity discharges than can
fry any of many components inside the box.
To clean the computer, use a can of compressed air to blow out any
dust, not a vacuum cleaner.
To clarify upon the clarification, "air" dusters (aka compressed air
cans) do NOT contain air. Liquid air must be contained in a thermal
flask since it rapidly absorbs heat and would turn gaseous. With a
boiling point of -194.35 C, it would take a LOT of pressure to keep it
liquid and a regulator to reduce pressure on exit. Fluorocarbons are
used in computer dusters because they change to liquid under little
pressure and removal of that low pressure causes them to vaporize
quickly into a gaseous state. Difluoroethane and tetrafluoroethane have
boiling points of -25 C and -26.3 C.
You cannot survive under water by sucking on a can of compressed "air"
used for computer duster cans. Read the label. Inhalation can be
fatal. There is no air inside that can. You aren't using a scuba tank
through a regulator to blow out your computer. The contents are heavier
than air and can collect so you also want to use in a ventilated area
(i.e., don't stick your head inside the case, yuk yuk).