"VanguardLH" offered:
Timothy Daniels wrote:

... What the PC needs right now is a good blow-out with compressed air
and a good vacuuming, ...

Hopefully you are using a vacuum that has been certified for use with
computers (and not just some "computer" vacuum that's meant to cleanup
the keyboard). With typical vacuum cleaners, the air rushing into the
nozzle generates static electricity that will zap your electronics.

In the past, I've blown the dust into the air with an electric air compressor,
and held the end of a vacuum cleaner hose about a foot away to suck up
the airborne dust - which can be seen glinting in the air under the fluorescent
desklamp. Nothing touches the electronic parts during this operation, and
nothing comes close enough to allow an electrostatic discharge. The operation
is noisy, though, with both electric appliances going. The fan, OTOH, is a
purely manual operation with a damp paper towel and Q-tips.

*TimDaniels*