Everything has to function well to start a PC correctly. Major reasons, for the problem in PC start up are:
- Corrupt OS Files
- Corrupt Registry Files
- Failed OS Updates
- Error Loading the OS
- Invalid Partition Table
- OS not found
- Reboot & select proper boot device
- It can also be Hardware or Malware issue:
- Virus or malicious SW
- Faulty HDD
- Corrupt Memory