Is it OK to use a vacuum cleaner to clean my PC? Compressed air just blows the dust everywhere, which is annoying. I've done it before and it never caused a problem
Put the Hoover down. Slowly, now—no one's PC has to die today. Good, now we can talk:
No! You'd be better off building a diorama of Dust Bowl-era Oklahoma inside your case and presenting it at a county fair. Vacuum cleaners generate static electricity that could easily mean the death of your system. In fact, get that PC away from anything associated with vacuum cleaners—the carpet, for instance.
There are 'computer vacuums' which advertise anti-static features, such as the DataVac , but they aren't cheap. The cheapest and simplest way to clean your PC remains compressed air and rubbing alcohol, annoying as that can be.