If you do post a note, don't say what it is.
"If you recently lost something, please see me in apt. XX."
Make them tell you what they lost and describe it fully.
You never know. It could be stolen - someone could have opened up the door to your building and tossed it in there because they thought they were being followed.
Give the owner a chance to come get it from you, or look around on the computer and try to find out who he is and take it back. If he's like any of us, his whole life is on that machine. He could lose his job because of the data he's lost. It's damned expensive to replace a computer. Maybe it's the company's computer and now they'll take it out of his paycheck, which means a bunch of his bills won't get paid. Mother's Day is next weekend...
Just give the damned thing back... after having a good look around on it. Look at the porn sites he visits and use the info to improve your business!!
You never know, he may have already reported it to the insurance and they're giving him a brand new one that's bigger and faster, and he'll tell you to just keep it! Then you get a free laptop with no guilt attached.
