Pre-built PC is stuck in a boot loop?

1. Emergency Recovery Steps 
Force interrupt the boot cycle 
Force shutdown 3 times in a row (press and hold the power button for 10 seconds after turning on the computer) 
Automatically enters the “Auto Repair” mode on the 4th boot 
2. Basic Repair Commands 
In the recovery environment, select ‘Troubleshooting’ → “Command Prompt” 
Execute the following commands: 
cmd 
bootrec /fixmbr 
bootrec /fixboot 
bootrec / scanos bootrec /rebuildbcd Targeted Solutions Graphics Card Driver Conflicts scanos 
bootrec /rebuildbcd 
Targeted Solutions 
3. Graphics Card Driver Conflicts 
In Safe Mode: 
cmd 
devmgmt.msc 
Disable Discrete Graphics (test with Nucleus only) 
4. System File Repair 
cmd 
sfc /scannow /offbootdir=C:\ /offwindir=C:\ Windows 
dism /image:C:\ /cleanup-image /restorehealth 
5. Retain Data Reinstallation 
Boot with Installation USB Flash Drive 
Select “Upgrade Installation” to retain files and programs 
Vendor Recovery Partitioning 
Press brand-specific keys (e.g., F9/DEL/ESC) when booting up the computer 
Select “Factory Reset” to restore the factory image 6. Key Notes 
Before Operation: 
Unplug all external devices (leave only the keyboard and mouse) 
Backup important data (via PE system) 
7. Hardware Self-Test: 
cmd 
mdsched.exe (Memory Test) 
chkdsk C: /f /r (Disk Test)