I'm going to send my computer for maintenance. But the services at my place have bad reputation, so I think I better be careful. I intend to write down all the hardware ID, so I can know if they change any of my hardware or not.
Please tell me how to acquire the unique IDs for CPU, Mainboard, Hard drive and RAM. In case it's too difficult, a number that maybe duplicate but rarely is also ok. I tried CPU-Z, but found no unique ID with it.