This is where I'm probably going to get shot down. I have rather different views of static from most of what you'll read in the computer do-it-yourself books
In years of fixing computers I've never blown one with static from a vacuum cleaner, and I've never heard of anyone else doing so. In fact, for a number of major companies I've carried out contract work for, it was an essential part of their so-called "computer service" offering
To be honest, the worry of static in computers is vastly over-hyped. I've probably blown five motherboards in over 12 years of working on PCs professionaly, and most of those were in the early days with machines that were far less resilient.
The only one I've blown in years was on a highly crowded video editing suite, where in trying to remove a graphics card the motherboard somehow discharged and blew the PCI-express bus. That was a very hot, very sweaty day and the job was in a rush - and I believe the case design was flawed and possibly not earthed
basically, if the PC is properly earthed, then static really should not be an issue