Most all computers have been dual voltage since the early 90's, if not longer. Even the desktop PC I brought to the UK in 1993 AND the ancient monitor had little switches on the back. Laptops have always been dual voltage to the best of my knowledge. Even my external hard drives are dual; just needed a plug adapter.
For other appliances, I also vote for the step down converter. Just make sure you get one that is sufficient for the wattage of your appliance, plus about 10% for surges. I've used many appliances for years with no issues, and DH uses all of his power tools with a big yellow "building site" converter. If you buy over here, converters are move expensive unless you get used ones. Having said that, we got a big ugly yellow converter that will handle about anything for about £65 from an electrical supply store here. Prettier (?) ones that sit on your counter top are generally the most expensive.