Thanks for reporting a bug you have found in Cursor!
Please add the following info to help us diagnose your issue:
Check the forum to ensure the issue hasn’t been reported already Provide a clear description of the bug Explain how to reproduce the bug (if known) Attach screenshots or recordings (e.g., .jpg, .png, .mp4). Tell us your operating system and your Cursor version (e.g., Windows, 0.x.x). Tell us if the issue stops you from using Cursor.
After struggling with persistent Cursor installation errors (both Error Code 5 and 0x80070005 “Access is denied”), I finally found a complete solution that worked for me. Sharing this in case anyone else encounters the same frustrating situation.
The Actual Problem
The root issue turned out to be my antivirus software silently quarantining Cursor.exe and preventing file operations during both installation and updates. Even after uninstalling and trying to reinstall, the quarantined files were causing conflicts.
Complete Solution Steps
Check Your Antivirus Quarantine
Open your antivirus software
Navigate to Quarantine/Virus Chest section
Search for “cursor” or “Cursor.exe”
Restore these files and add them to exceptions
Clean Up Previous Installation
Unpin any Cursor icons from your taskbar (especially blank/broken ones)
Close all Cursor processes via Task Manager
Disable Antivirus Temporarily
Disable your antivirus protection for 10 minutes
Make sure to disable all protection layers (real-time scanning, application control, etc.)
Fresh Installation
Run the Cursor installer as administrator
If you encounter any errors, click “Try again”
Complete the installation process
Post-Installation
Before re-enabling antivirus, add these to exceptions:
Cursor.exe
The entire Cursor installation folder
Now re-enable your antivirus protection
Restart your computer
This worked perfectly for me after trying many other partial solutions. The key insight was that the antivirus had quarantined files but wasn’t clearly notifying me about it, which kept causing the “Access denied” errors during installation.
Hope this helps someone else save time troubleshooting!
Tell us:
Check the forum to ensure the issue hasn’t been reported already
Provide a clear description of the bug
Explain how to reproduce the bug (if known)
Attach screenshots or recordings (e.g., 
Tell us your operating system and your Cursor version (e.g.,