Your Windows will automatically turn off after a certain period of inactivity.
Your Windows will automatically turn off after a certain period of inactivity.
You might need to change your Windows settings after upgrading from the I3 2120 to the I7 3770. The new CPU could affect system behavior, but it shouldn't cause automatic deactivation unless you disable certain features. Regarding data safety, ensure your backup is secure before switching.
If you're worried you can generally sign in to your Microsoft Account, go to My Devices and deregister the device activation which frees up the key to be activated on different hardware. You should do this BEFORE the hardware swap and I believe you cannot do this with OEM keys, only Retail ones. That said, as others have already mentioned, a CPU swap shouldn't affect activation. You should be fine and even if you're not you can normally just ring the MS activation line, go through automated phone activation and it will reactivate without you even needing to speak to someone. I get the impression from MS that they really don't care how many times users reuse keys any more, they just want Windows 10 on as many devices as possible.