Miss Snoopy can do this as indeed can Mrs Snoopy's sister. I spend half my life sorting out their Laptops and PCs. Even worse when SiL visits as she will insist on bring dubious CDRs with her for the child to view/play with/learn from. The only thing learned is bad language from me. I now remove the PC from the child's room before her Aunt gets here.
Her last visit before one (ie before I adopted the "Sorry it's off for repair" story) it cost me £100 to get the damn thing fixed. Geek in PC repair shop laughed a lot and told me someone had imported "nasties" that had defeated my anti virus software and stripped the hard drive. That may, of course, have been a "con" but it's for sure the bugger wouldn't work after the witch had been on it and if it was a yarn to get money out of me he must have a brother in another shop who said the same thing but wanted even more to put it right.