It happens all the time in small orgs. In a past org, some employee left after working for 5-6 months and I got their laptop. It was well set up, fast but not clean. Now my local IT guy gave me that. He is IIT 9 pointer. A great highly skilled guy who primarily used to handle server and was a data engineer. At times he used to handle occasional IT set up request in Hyderabad like he did for me. It was easier for everyone to do it like that. He is not really expected to "clean" my laptop. It is like a kind of good Jugad company had. The company culture was excellent, people were closely connected. So don't overreact unless you know the story. At times, in small organisations, lot of things happen. Next I worked in a big company where it was unimaginable to give second hand laptop however new they were. It really depends on organisation & their size and culture