Open Command Prompt as Administrator. Run:
slmgr /upk
slmgr /ckms
slmgr /rearm
This removes the product key, clears any KMS server addresses, and resets the licensing timers. index of kmspico
Windows 11 Home OEM keys often cost as little as $25-$40 from authorized retailers (not eBay or random key sites). Microsoft Office Home & Student 2021 (one-time purchase) costs around $149 and includes full Word, Excel, PowerPoint. Open Command Prompt as Administrator
If that is too expensive, consider Microsoft 365 Family for $99/year (covers 6 users, 1TB OneDrive each). This removes the product key, clears any KMS
KMSPico is an unofficial tool designed to activate Microsoft Windows and Microsoft Office products without purchasing a valid license. It works by emulating a Key Management Service (KMS) server.