My very lengthy troubleshooting process:
1. Install Emsisoft Anti-Malware
Here. (Activate 30-day trial)
2. Uninstall Bitdefender using uninstall programs.
3. Reboot when necessary
(Did startup time increase? If yes go to step 4, if no, go to step 5)
4. Uninstall Emsisoft then choose another antivirus
5. Download Glary Utilities
here.
6. Click "Advanced Tools"
7. Click "Startup Items"
8. Disable any programs that do not need to be there
9. Reboot you computer
(Did startup time increase? If yes, go to step 10, if no, go to step 11)
10. Nothing... You're done
11. Install Emsisoft Online Armor
here.
12. Disable Windows Firewall
13. Reboot
(Did startup time increase? If yes, go to step 14, if no go to step 15)
14. Keep Online Armor on and Emsisoft on, congrats for the achievement!
15. Go to step 16 for cleanup process (then reply for more confusing steps
)
16 (Cleanup): Uninstall Online Armor and Emsisoft Anti-Malware, reinstall Bitdefender, reenable Windows Firewall, and uninstall Glary Utilities
Very confusing, but it might help!
Cheers, Chromatinfish