Network sharing broke after working many years OK


spapakons said:
Open PowerShell as Administrator and execute:

Set-SmbClientConfiguration -RequireSecuritySignature $false

This will restore the older security settings and you should be able to connect from all computers. If you also want access without using a password, also execute this command:

Set-SmbClientConfiguration -EnableInsecureGuestLogons $true
Click to expand...
You already suggested this in post 16, and OP says they did the first one in post 11. This isn't a guest access issue if he's not even resolving an IPv4 address for the remote computer.
 

My Computer My Computer

At a glance

Win11 Ent. 25H2
OS
Win11 Ent. 25H2
pseymour said:
On Starship, can you disable the hosts file entries again, and run these in Powershell?

Powershell: 
Resolve-DnsName darkmatter -Type A
Resolve-DnsName darkmatter -Type AAAA
Get-DnsClientServerAddress -AddressFamily IPv4
Get-DnsClientServerAddress -AddressFamily IPv6
Click to expand...
Code: 
PowerShell 7.6.6
PS C:\Users\MisterEd> Resolve-DnsName darkmatter -Type A

Name                                           Type   TTL   Section    IPAddress
----                                           ----   ---   -------    ---------
DarkMatter.local                               A      120   Answer     10.0.0.2
DarkMatter.local                               AAAA   120   Additional 2601:7c0:ca80:df0::d6dd
DarkMatter.local                               AAAA   120   Additional 2601:7c0:ca80:df0:7135:2575:5e14:d0af
DarkMatter.local                               AAAA   120   Additional 2601:7c0:ca80:df0:e454:b046:6710:e281
DarkMatter.local                               AAAA   120   Additional fe80::8a08:b202:f693:85e5

Name           : DarkMatter.local
QueryType      : NSEC
TTL            : 120
Section        : Additional
NextDomainName : DarkMatter.local
TypeBitMap     : {0, 8, 0, 0…}


PS C:\Users\MisterEd> Resolve-DnsName darkmatter -Type AAAA

Name                                           Type   TTL   Section    IPAddress
----                                           ----   ---   -------    ---------
DarkMatter.local                               AAAA   120   Answer     2601:7c0:ca80:df0::d6dd
DarkMatter.local                               AAAA   120   Answer     2601:7c0:ca80:df0:7135:2575:5e14:d0af
DarkMatter.local                               AAAA   120   Answer     2601:7c0:ca80:df0:e454:b046:6710:e281
DarkMatter.local                               AAAA   120   Answer     fe80::8a08:b202:f693:85e5
DarkMatter.local                               A      120   Additional 10.0.0.2

Name           : DarkMatter.local
QueryType      : NSEC
TTL            : 120
Section        : Additional
NextDomainName : DarkMatter.local
TypeBitMap     : {0, 8, 0, 0…}


PS C:\Users\MisterEd> Get-DnsClientServerAddress -AddressFamily IPv4

InterfaceAlias               Interface Address ServerAddresses
                             Index     Family
--------------               --------- ------- ---------------
Ethernet 2                          21 IPv4    {}
Local Area Connection* 8            19 IPv4    {}
Local Area Connection* 9            11 IPv4    {}
Wi-Fi                                8 IPv4    {75.75.75.75, 75.75.76.76}
VMware Network Adapter V...1         9 IPv4    {}
VMware Network Adapter V...8        23 IPv4    {}
Bluetooth Network Connection        20 IPv4    {}
Ethernet                            17 IPv4    {}
Loopback Pseudo-Interface 1          1 IPv4    {}
vEthernet (Default Switch)          25 IPv4    {}

PS C:\Users\MisterEd> Get-DnsClientServerAddress -AddressFamily IPv6

InterfaceAlias               Interface Address ServerAddresses
                             Index     Family
--------------               --------- ------- ---------------
Ethernet 2                          21 IPv6    {fec0:0:0:ffff::1, fec0:0:0:ffff::2, fec0:0:0:ffff::3}
Local Area Connection* 8            19 IPv6    {fec0:0:0:ffff::1, fec0:0:0:ffff::2, fec0:0:0:ffff::3}
Local Area Connection* 9            11 IPv6    {fec0:0:0:ffff::1, fec0:0:0:ffff::2, fec0:0:0:ffff::3}
Wi-Fi                                8 IPv6    {2001:558:feed::1, 2001:558:feed::2, 2001:558:feed::1, 2001:558:feed::2}
VMware Network Adapter V...1         9 IPv6    {fec0:0:0:ffff::1, fec0:0:0:ffff::2, fec0:0:0:ffff::3}
VMware Network Adapter V...8        23 IPv6    {fec0:0:0:ffff::1, fec0:0:0:ffff::2, fec0:0:0:ffff::3}
Bluetooth Network Connection        20 IPv6    {fec0:0:0:ffff::1, fec0:0:0:ffff::2, fec0:0:0:ffff::3}
Ethernet                            17 IPv6    {fec0:0:0:ffff::1, fec0:0:0:ffff::2, fec0:0:0:ffff::3}
Loopback Pseudo-Interface 1          1 IPv6    {fec0:0:0:ffff::1, fec0:0:0:ffff::2, fec0:0:0:ffff::3}
vEthernet (Default Switch)          25 IPv6    {fec0:0:0:ffff::1, fec0:0:0:ffff::2, fec0:0:0:ffff::3}

PS C:\Users\MisterEd>
 

My Computers My Computers

System One System Two

  • At a glance

    Windows 11 Pro 26H2 (26300.9547)AMD Ryzen 7 6800H with Radeon 680M GPU (486MB...Crucial DDR5-4800 (2400MHz) 32GB (2 x 16GB)NVIDIA RTX 3060 Laptop (6GB RAM)
    OS
    Windows 11 Pro 26H2 (26300.9547)
    Computer type
    Laptop
    Manufacturer/Model
    ASUS TUF Gaming A15 (2022)
    CPU
    AMD Ryzen 7 6800H with Radeon 680M GPU (486MB RAM)
    Memory
    Crucial DDR5-4800 (2400MHz) 32GB (2 x 16GB)
    Graphics Card(s)
    NVIDIA RTX 3060 Laptop (6GB RAM)
    Sound Card
    n/a
    Monitor(s) Displays
    15.6-inch
    Screen Resolution
    1920x1080 300Hz
    Hard Drives
    2 x Samsung 990 Evo Plus (2TB M.2 NVME SSD)
    PSU
    n/a
    Mouse
    Wireless Mouse M510
    Internet Speed
    2100Mbps/300Mbps
    Browser
    Firefox
    Antivirus
    Malwarebytes

  • At a glance

    Windows 11 Pro 26H2 (26300.9547)AMD Ryzen 7 5700X3DG.SKILL Flare X 32GB (2x16GB) DDR4ASUS ROG-STRIX-RTX3060TI-08G-V2-GAMING (RTX 3...
    Operating System
    Windows 11 Pro 26H2 (26300.9547)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom build
    CPU
    AMD Ryzen 7 5700X3D
    Motherboard
    ASUS ROG Strix B550-F Gaming WiFi II
    Memory
    G.SKILL Flare X 32GB (2x16GB) DDR4
    Graphics card(s)
    ASUS ROG-STRIX-RTX3060TI-08G-V2-GAMING (RTX 3060-Ti, 8GB RAM)
    Monitor(s) Displays
    Samsung G50D IPS 27"
    Screen Resolution
    1440p/180Hz
    Hard Drives
    SAMSUNG 990 EVO Plus (2TB] M.2 NVME SSD
    SAMSUNG 990 EVO Plus (4TB) M.2 NVME SSD
    PSU
    Corsair RM750x (750 watts)
    Case
    Cooler Master MasterCase 5
    Cooling
    Scythe Mugen 6
    Keyboard
    Logitech K520 (MK540 keyboard/mouse combo)
    Mouse
    Logitech M310 (MK540 keyboard/mouse combo)
    Internet Speed
    2100 Mbps down / 300 Mbps up
    Browser
    Firefox, Edge, Chrome
    Antivirus
    Malwarebytes (Premium)
    Other Info
    ASUS Blu-ray Burner BW-16D1HT (SATA) || Western Digital Easystore 20TB USB 3.0 external hard drive used with Acronis True Image 2025 backup software || HP OfficeJet Pro 6975 Printer/Scanner
Watching first part of this vid might help especially about the password. Might give some ideas.


Youtube
 

My Computers My Computers

System One System Two

  • At a glance

    Win 11 ProAMD Ryzen™ 7 7730U24GB Dual-Channel DDR4 @ 1596MHz (22-22-22-52)512MB ATI AMD Radeon Graphics (ASUStek Comput...
    OS
    Win 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    ASUS Vivobook
    CPU
    AMD Ryzen™ 7 7730U
    Motherboard
    M1605YA
    Memory
    24GB Dual-Channel DDR4 @ 1596MHz (22-22-22-52)
    Graphics Card(s)
    512MB ATI AMD Radeon Graphics (ASUStek Computer Inc)
    Monitor(s) Displays
    Generic PnP Monitor (1920x1200@60Hz) - P1 PLUS (1920x1080@59Hz)
    Screen Resolution
    1920 X 1200
    Hard Drives
    953GB Western Digital WD
    PSU
    45 Watts
    Mouse
    Lenovo Bluetooth.
    Internet Speed
    500 Mbps
    Browser
    Edge
    Antivirus
    Defender

  • At a glance

    Windows 11AMD Ryzen 7 5800H / 3.2 GHz32 GB DDR4 SDRAM 3200 MHzNVIDIA GeForce RTX 3060 6 GB GDDR6 SDRAM
    Operating System
    Windows 11
    Computer type
    Laptop
    Manufacturer/Model
    ACER NITRO
    CPU
    AMD Ryzen 7 5800H / 3.2 GHz
    Motherboard
    CZ Scala_CAS (FP6)
    Memory
    32 GB DDR4 SDRAM 3200 MHz
    Graphics card(s)
    NVIDIA GeForce RTX 3060 6 GB GDDR6 SDRAM
    Sound Card
    Realtek Audio. NVIDIA High Definition Audio
    Monitor(s) Displays
    15.6" LED backlight 1920 x 1080 (Full HD) 144 Hz
    Screen Resolution
    1920 x 1080 (Full HD)
    Hard Drives
    Samsung 970 Evo Plus 2TB NVMe M.2
    PSU
    180 Watt, 19.5 V
    Mouse
    Lenovo Bluetooth
    Internet Speed
    500 Mbps
    Browser
    Edge
    Antivirus
    Defender
@MisterEd Is there a reason you're using Comcast's DNS servers (75.75.x.x) for name resolution instead of your router?
 

My Computer My Computer

At a glance

Win11 Ent. 25H2
OS
Win11 Ent. 25H2
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