This is original OEM Windows 10 key. You will have to download the software from Microsoft site. Link will be given to you if you need. I can install for you. You'll have to leave your machine with me for 3-5 days. Add on SGD20 I'll reformat & install for your laptop. (For desktop, I'll need to charge you transport accordingly) Add on SGD25 I'll set as bootcamp for your MACBOOK. Please backup your data. (For desktop iMac, I'll need to charge you transport accordingly) Payment method: ibank transfer, cash is possible if meet to collect hardware. Delivery: the code will be send to your email or via text after payment is received. For hardware, meet to collect/handover.