The ability to perform hexes is common to a degree or other to all wizards.
Magic always has always affected technology, generally adversely, often damaging beyond repair. What has been affected has changed over the years; today it is generally firearms, solid state technology, electricity, and engines.(reference needed)
The Medical examiners Butters hypothesized that wizards are surrounded by a "murphyonic field" (whatever can go wrong, will), closely linked to the their healing powers.
Harry is often shown knowingly or unknowingly hexing computers, electrial material, fences, firearms, lights, sound systems, explosives, and more.