English version comes after Japanese.
留学先の短大で情報処理専攻だったので最初の就職はIT部門のヘルプデスクでした。そこから25年、変わらず思うことは「PCの動きがおかしくなったらとりあえず再起動してみな」ということです。IT担当していて呼び出される時のたぶん半分はPC再起動で直ってるんじゃないかな。たぶん皆さん怖いのでそれ以上いじらずにITの人を呼ぶんだと思うんですけど、かなりの確率で再起動で元に戻れるからとりあえず再起動、それでも戻らなかったらITの人を呼びましょう。
I studied Computer Information Systems at college and my first job was a helpdesk, IT department. It's been 25 years since then and I still suggest people the same thing. Reboot first if something wrong with your PC. From my experience, half the time I went to see colleague's PC, it only took a reboot. I assume some people just call IT person because they're too afraid to do anything unusual on their PC but try a reboot first. It won't hurt. If a reboot didn't work, then call your IT department.