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Hi GJTSimpson,
Thank you for reaching Microsoft Community.
Can you please make sure on the model of the device if this is a Surface Book 2 or a Surface Book? To confirm, you may enter the serial number here: Surface Support for Business Online Service Center - Welcome. Surface Book 2 should have either 8th Gen Intel® Core™ i7-8650U quad-core processor or 8th Gen Intel® Core™ i5-8350U quad-core processor which are compatible with Windows 11 (7th Gen Intel® Core™ i5-7300U dual-core processor not compatible). See: Surface Book 2 features (microsoft.com). Intel® Core™ i7-6600U is used on Surface Book 1.
As people move forward, so must technology. The Windows PC has become an essential device that people are relying on more than ever to connect, work, learn, create, and play. With this increased reliance, comes a need to adapt software and hardware to keep pace with people’s needs and harness the true value and power of the PC to deliver the best experiences, now and in the future. New hardware requirements enable us to deliver a higher quality, more secure, and more reliable Windows experience for our customers. By leveraging the latest hardware technologies, we’re able to deliver the most advanced software experience, meeting the needs of an ever-growing and diverse ecosystem.
Regarding with replacing the processor concern, I'm sorry but the Surface was built compact and therefore, we could (not allowed also) not physically open the device to replace the processor.
Kind regards,
Marrion