If the error specifically says a file like btwhidcs.dll or mfc80.dll is missing: The Best Free Windows Repair Tool To Fix Any Problem
Search for your specific model and download the Bluetooth Driver or WIDCOMM Bluetooth Software . This will replace the missing or corrupt bttray.exe with a fresh, official copy. The "No-Cost" Fix: Disable the Startup Error download bttray exe repair tool
Visit your PC manufacturer’s support site (e.g., Dell Support , HP Support, or Lenovo Support). If the error specifically says a file like btwhidcs
They often require a paid subscription to actually "fix" the issue and are generally considered unnecessary by IT professionals when a free driver reinstall does the same job more safely. Troubleshooting Missing DLLs They often require a paid subscription to actually
Since BTTray.exe belongs to your Bluetooth hardware, the most effective "repair" is to reinstall the official driver from your manufacturer.