If Kmspico Portable fails to activate your software, there are a few troubleshooting steps you can take. First, ensure that you are running the tool with administrative privileges, as it requires elevated permissions to modify system files. Also, check your internet connection, as the activation process sometimes needs to verify online. If it still doesn’t work, you might consider temporarily disabling your antivirus software, as it could be blocking the activation process. If none of these solutions help, you might want to look into official activation methods or consider reaching out to Microsoft support for assistance.