Process exited with code 201 (0xc9, -55)
From BOINC Wiki
Exit code 201 happens when your GPU goes bust. The error essentially means that a GPU that was detected earlier has gone missing.
- Your OS updated a driver to a version without the required components (OpenCL, CUDA).
- You manually removed (part of) a driver.
- Your GPU has broken.
- Your motherboard has broken.
- Virus or Malware.