hello ghostman, how are you?well, i have got two pc's.one of the them is used by my father himself.and other for me.but recently my fathers pc didnt started as a message appeared like this in the monitor---no input.the computer hardware guy said that there is lots of dust inside the cpu.he cleaned it now running perfectly. so the problem is that since my main problems with pc's is dust since my house is nearby to the road.so there is dust pollution. he said that if we got a vacuum cleaner.just clean the whole place where the two pc's is placed. also i have one doubt.can we open the cpu and just clean the whole dust with a vacuum cleaner.because he too asked for that.i think that's a bright idea.instead of cleaning with the cloth.because the graphics card,tv tuner card etc...since it is very sensitive.if in case it doesnt read due to continous cleaning with a cloth.so better wipe out the dust inside the cpu with a vacuum cleaner.so just is that a good idea or not?looking forward to your reply. i also fear lifting various cards.(ie.graphic cards,tv tuner cards etc)since it is very sensitive.lifting it up and inserting again is very dangerous.right.so can i use a vaccum cleaner to wipe out the dust.