Hi Tony, this is Henry. I'd like to share some insights regarding the issue. Apologies that I can't respond in your native language, but I’ve translated the content to better understand the context.
You mentioned that you're currently on the Windows Insider Program. The progressively slower performance you’re experiencing—especially the mouse lag—strongly suggests one of two likely causes: either an unstable Insider build or potential hardware issues.
Before we move forward, could you please share a screenshot of your Task Manager? I'd like to review the details for RAM, CPU, and storage usage to get a clearer overview and offer a more specific action plan. Also, please check that your C: drive has sufficient free space. In the meantime:
Insider builds are pre-release versions of Windows and are often unstable. They frequently lead to performance problems and memory leaks over time. I recommend switching to the stable public release of Windows:
- Visit the official Microsoft Windows 11 download page.
- Use the Media Creation Tool to create a bootable USB.
- Perform a clean installation of Windows to ensure you're on the stable release channel.
Let me know how it goes, and I’m happy to assist further from here.