"That shit happened to me five times a day, for five days a week, for seven and a half years as a field service engineer."
Ditto, and, of course, it's my job. But only of it's actually covered by the contract. Hardware only, and if it's a PC we supplied, we'll install the OEM generic image of the OS if they insist on it when an HDD is replaced. 99 times out of a 100, that's a pointless exercise for them and me. Luckily for me, these days we primarily deal with larger customers who have IT departments and network installable images for which I, as an external contractor, am rarely given credentials for.
And, from the article "Do the words “just in case“ also fill you with foreboding?"
In my case, the words I dread most are "While you are here...". Having said that, if it's something I can deal with, it's on contract and I have the parts, great, I'll book the job, do it, and save myself a trip for tomorrow and up my ob count for the day with little effort.