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"Unknown PC or device detected"


Posts
1
#1
I'm not truly the best with computers, and this is a new pop up for me. I just purchased this new dell laptop in May and have had no problems with it. However, in the last few weeks I've been getting a new pop up in the right hand corner. My house hold have a wireless router that is password protected. I have McAfee Security Center updated, and shows that all my firewalls and security systems are on and active.
However, this is the message I get and I'm concerned about my networks safety:
"Unknown PC or device detected
This PC or device has connected to your network:
IP Adress xxxxxxx"

I've opened my action center to make sure everything is okay, and the only thing I find that isn't turned on is the "Network Access Protection" - which is something I haven't touched before, nor does it provide a link in which to turn it on. However, in browsing other forums I've found that everyone says turning it on isn't necessary or important.

Looking for help on my issue, and would like to know if the message I'm getting means my computer is at risk.
Thank you in advance!
 

My Computer

System One

  • OS
    8

my2cents

Veni, Vidi, Vici
VIP Member
Guru
Posts
2,191
#2
Hmmm... since no one has responded yet, I'll ask a few questions. So, are you using a router and a wireless connection to access the internet? If so, have you set up router security so a password is always required for anyone trying to gain access? Also, can you go here and do this simple test to see if you have any open ports that are vulnerable to inbound intrusion attempts? Here's the link and here's my results:

https://www.grc.com/x/ne.dll?bh0bkyd2

Screenshot (17).png
 

My Computer

System One

  • OS
    Windows 8.1
    Computer type
    PC/Desktop
    CPU
    Intel G2020
    Motherboard
    ASRock B75M-DGS R2.0
    Memory
    8GBs @ 1333 MHz
    Hard Drives
    Samsung 840 EVO
    PSU
    400w
    Internet Speed
    57/11

Shadowjk

Network Enthusiast
VIP Member
Power User
#3
I'm not truly the best with computers, and this is a new pop up for me. I just purchased this new dell laptop in May and have had no problems with it. However, in the last few weeks I've been getting a new pop up in the right hand corner. My house hold have a wireless router that is password protected. I have McAfee Security Center updated, and shows that all my firewalls and security systems are on and active.
However, this is the message I get and I'm concerned about my networks safety:
"Unknown PC or device detected
This PC or device has connected to your network:
IP Adress xxxxxxx"

I've opened my action center to make sure everything is okay, and the only thing I find that isn't turned on is the "Network Access Protection" - which is something I haven't touched before, nor does it provide a link in which to turn it on. However, in browsing other forums I've found that everyone says turning it on isn't necessary or important.

Looking for help on my issue, and would like to know if the message I'm getting means my computer is at risk.
Thank you in advance!
Open a command prompt and ping the IP address stated.

Once done enter the following command and retrieve the MAC address.

Code:
arp -a
For example if the IP address was 192.168.0.1 then I can see that the MAC address of that device in the arp table.

arp.png

From here log on to your routers settings and see where this MAC address is coming from. Is it wireless or wired? What is the hostname (if any)? Do you recognise it?

Josh :)
 

My Computer

System One

  • OS
    Windows 8.1 Pro 64-bit ; Windows Server 2012 R2 Standard
    Computer type
    PC/Desktop
    System Manufacturer/Model Number
    Custom Built
    CPU
    Intel Core i5 2400 @ 3.10GHz
    Motherboard
    Foxconn H67MP-S/-V/H67MP (CPU 1)
    Memory
    8.0GB DDR3 @ 665MHz (2GBx4)
    Graphics Card(s)
    AMD Radeon HD 6800 Series (Sapphire/PCPartner)
    Sound Card
    Realtek High Definition Audio
    Monitor(s) Displays
    SMB1930NW + AOC 2243W
    Screen Resolution
    1440x900 + 1920x1080
    Hard Drives
    977GB Seagate ST31000524AS ATA Device (SATA)
    250GB WD iSCSI attached drive
    PSU
    750W PSU
    Case
    Novatech Night
    Keyboard
    Dell Standard PS/2 Keyboard
    Mouse
    R.A.T 7 Gaming Mouse
    Browser
    Google Chrome
    Other Info
    Optiarc DVD RW AD-5260S ATA Device