I have a colleague who has a number of laptops in his office. Some are Lenovo ThinkPads that have Windows 8 disks although they arrive with Windows 7 installed.
He has "reinstalled" Windows on these machines. He reports that there are 4 disks for that purpose. I've never seen them so I haven't been through the reinstall process.
The problem is that the "rebuilt" machines act strangely and have obviously carried forward things like wireless security settings, wireless connections in general and so forth. That's why we were surprised when a "new" laptop was introduced to the office and it automatically connected to the secured wireless network.
I could ask: "What did he do to get things this way?" It wasn't the intended outcome.
I should ask: "What is the correct procedure for getting a "clean" install using the Lenovo disks?