I'm sorry to hear you're having trouble installing Spine. Based on the information available, you should try downloading and reinstalling the latest version of Spine. If you are unable to find your Spine license page, you can use the Spine License Recovery page to retrieve it. Additionally, ensure that your antivirus or anti-malware software is not interfering with the installation process, as these programs can sometimes delete or modify Spine's files.

For further troubleshooting, you can refer to the Spine Troubleshooting page, which provides solutions to common issues.

This is always some other software interfering with Spine. Make sure you aren't running malicious or invasive software. Make sure you have the latest Spine launcher.

You can post your spine.log, but it probably doesn't give many clues for this problem.

You said in email you are using Bit Defender, some people here explain how to configure it:
https://esotericsoftware.com/forum/d/16236-other-software-has-interfered-with-spines-operation/13

You also said in email that you got it to run. Can you please say what you did so others might be able to do the same?