Factory reset Cisco 4451 via console

[wh90is]

hello, how to reset a cisco 4451 router if you no longer have the password (via console)?

Thanks

[MHM Cisco World]

https://m.youtube.com/watch?v=WYQMJoIKvvA

[wh90is]

Hi i have already seen the video. I just dont understand how to get into the menu "Router>". When i connect to the router its asking for login.

[MHM Cisco World]

Device reboot you must do breack sequence' it different depend on win mac. This process make access to rommon.

Check video again he explains this point in time 1:10 of video 

[wh90is]

Hi, im using windows and putty. When i spamming the command "break" the router is just booting normaly.  

[MHM Cisco World]

ctrl+break 

[wh90is]

---

Initializing Hardware ...

Checking for PCIe device presence...done
System integrity status: 0x610
Rom image verified correctly

System Bootstrap, Version 16.7(4r), RELEASE SOFTWARE
Copyright (c) 1994-2017 by cisco Systems, Inc.

Current image running: Boot ROM0

Last reset cause: PowerOn
ISR4451-X/K9 platform with 4194304 Kbytes of main memory

PASSWORD RECOVERY FUNCTIONALITY IS DISABLED

...

PASSWORD RECOVERY IS DISABLED.
Do you want to reset the router to the factory default
configuration and proceed y/n [n]:

Router continuing with existing configuration...

no valid BOOT image found
Final autoboot attempt from default boot device...
Failed to find bootable image on device bootflash:

..

PASSWORD RECOVERY IS DISABLED.
Do you want to reset the router to the factory default
configuration and proceed y/n [n]:

Router continuing with existing configuration...

autoboot: boot failed, restarting...

Resetting .......

---

"break" doesnt work. i only get the "factory default configuration" when im using break. 

[MHM Cisco World]

ctrl+ 

this need to enter Rom mode  

[Leo Laohoo]

---

@wh90is wrote:

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PASSWORD RECOVERY IS DISABLED.
Do you want to reset the router to the factory default
configuration and proceed y/n [n]:

---

Where was this router sourced from? 

I want to highlight the question posed.  The answer should be "y" and the default answer is "n".

[MHM Cisco World]

he will loss his config, if he do factory reset. 
I think he can access ROM and change the password