I have been cleaning computers with a vacuum cleaner for over 20 years. Never damaged one. My vacuum has a plastic end on it. No Static. I clean them with vacuum and paintbrush for a quick clean. But after that long I suggest dissembling the computer inside, (at least take the cpu cooler off, and re-thermal compound it.) You will not get all the dirt in the crevasses with a vacuum. Has anyone here who thinks you will fry your computer with a vacuum ever seen it or even hear of it happening? I have cleaned THOUSANDS of computers that way. Never a mishap.