My work laptop stopped working about 8 weeks ago. Fortunately, I had an ex-colleagues computer in the office so I've been using that instead. I had arranged to drop the old laptop into our IT department but kept on forgetting as I mostly work from home. I've had the broken computer since and thought nothing of it. I now receive a call from IT saying that they need the computer back as they're worried about a potential breach. I asked what had happened but he couldn't really tell me and just said they need to download files from it to send to an investigation company. I'm terrified I've done something criminal (I dont think I have) or I'm in serious trouble and the police have asked for it. What could this be? I don't know if I'm being too anxious.