Hello maks st, welcome to Microsoft Q&A forum.
Roblox is a third-party application, and issues such as the one you describe are often caused by software conflicts, corrupted installation files, driver interactions, residual settings, or other local environmental factors that can accumulate over time.
You have already attempted the most common troubleshooting steps, which effectively rules out simpler causes.
From a practical standpoint, the most efficient and reliable resolution in persistent cases like this—where multiple potential conflicting elements may be at play—is to perform a Reset this PC (Keep my files) option. This process reinstalls Windows cleanly, removes all installed applications and custom system settings (while preserving your personal files), and eliminates a broad range of underlying conflicts in one step, saving significant time compared to isolating each possible cause individually.
- Navigate to Settings > System > Recovery.
- Under Reset this PC, select Get started.
- Choose Keep my files. Follow the on-screen prompts to complete the reset.
- After completion, reinstall Roblox and test again.
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