If its retail, complain to MS. Retail license means its valid on every one device at the time, without limits. OEMs can be refused to activate on new hardware, or after some other limit and by installing one you agree on that limit. Ofc you can try with OEM to call and make-up some sad story. Thats up to you.
E: Or if license is connected to your MS account, just login. Connecting key to account frees it from limits.