Cheap licenses real or fake?


Add my total satisfaction with StackSocial as a source for Win11 & Microsoft Office programs bought months ago. Both installed without single hitch & running without fail to this day.
 

My Computer

System One

  • OS
    Win11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Self Made
    CPU
    Intel i7-11700K
    Motherboard
    Asus Z590P
    Memory
    32GB GSkill
    Graphics Card(s)
    AMD Radeon R7 200 Series
    Monitor(s) Displays
    Acer
    Screen Resolution
    1920 x 1080
    Hard Drives
    WD- two chip type & one SATA, plus one external WD
    Case
    Cooler Master
    Cooling
    Three fans
    Keyboard
    Old
    Mouse
    Logitech M510
    Internet Speed
    100mbs
    Browser
    Chrome
    Antivirus
    Malwarebytes

My Computers

System One System Two

  • OS
    Win 11 Pro 25H2, Build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Brew
    CPU
    Intel Core i5 14500
    Motherboard
    Gigabyte B760M G P WIFI
    Memory
    64GB DDR4
    Graphics Card(s)
    GeForce RTX 4060
    Sound Card
    Chipset Realtek
    Monitor(s) Displays
    LG 45" Ultragear, Acer 24" 1080p
    Screen Resolution
    5120x1440, 1920x1080
    Hard Drives
    Crucial P310 2TB 2280 PCIe Gen4 3D NAND NVMe M.2 SSD (O/S)
    Silicon Power 2TB US75 NVMe PCIe Gen4 M.2 2280 SSD (backup)
    Crucial BX500 2TB 3D NAND (2nd backup)
    Seagate 4TB Ironwolf, rotating HDD archive files
    External off-line backup Drives: 2 NVMe 4TB drives in external enclosures
    PSU
    Thermaltake Toughpower GF3 750W
    Case
    LIAN LI LANCOOL 216 E-ATX PC Case
    Cooling
    Lots of fans!
    Keyboard
    Microsoft Comfort Curve 2000
    Mouse
    Logitech G305
    Internet Speed
    Verizon FiOS 1GB
    Browser
    Firefox
    Antivirus
    Malware Bytes & Windows Defender Security
  • Operating System
    Win 11 Pro 25H2, Build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Brew
    CPU
    Intel Core i5 14400
    Motherboard
    Gigabyte B760M DS3H AX
    Memory
    32GB DDR5
    Graphics card(s)
    Intel 700 Embedded GPU
    Sound Card
    Realtek Embedded
    Monitor(s) Displays
    27" HP 1080p
    Screen Resolution
    1920x1080
    Hard Drives
    Crucial P310 2TB 2280 PCIe Gen4 eD NAND PCIe SSD
    Samsung EVO 990 2TB NVMe Gen4 SSD
    Samsung 2TB SATA SSD
    PSU
    Thermaltake Smart BM3 650W
    Case
    Okinos Micro ATX Case
    Cooling
    Fans
    Keyboard
    Microsoft Comfort Curve 2000
    Mouse
    Logitech G305
    Internet Speed
    Verizon FiOS 1GB
    Browser
    Firefox
    Antivirus
    Malware Bytes & Windows Defender Security
I have three keys for Office 2021. I used Pidkey to test all the keys at the same time.

Results with Pidkey:
Key #1: Unsupported PKeyConfig file or Invalid Key (for laptop)
Key #2: Description: Office21_ProPlus2021MSDNR_Retail (for desktop)
Key #3: Description: Office21_ProPlus2021MSDNR_Retail (replacement for laptop)

Key #1 was purchased in 2022 for my laptop
Key #2 was purchased in 2024 for my desktop
Key #3 was purchased in 2026 for my laptop when the original would no longer activate.

Keys 2 & 3 came from Stack Social. Key #1 came from another online seller.

Note the keys are Office Pro Plus 2021 not Office Pro 2021. Office Pro Plus 2021 is a volume license product. Also, note MSDN Retail. That means they originally came from a Microsoft MSDN subscription purchased by a computer professional. This explains it better...

MSDN (now Visual Studio Subscription) retail keys typically allow for 10 activations of Windows or Office products, designed for development and testing purposes. While some MSDN retail keys may allow for more, 10 is the standard limit for many software keys, and these, unlike volume keys, are not meant for production environments.
  • Activation Limits: Keys are often limited to 10 activations, though some keys may reset or allow for additional activations if needed.
  • Usage Restrictions: MSDN software is officially licensed for development and testing, not for production, except for one instance of Office.
  • Key Types: MSDN provides several types of keys, including retail (multiple activations) and Multiple Activation Keys (MAK).
  • Reactivation: If the activation limit is reached, you may need to contact Microsoft to request a reset or new keys, a process documented on Microsoft Learn.
  • Alternative Activation: For enterprise scenarios, Multiple Activation Keys (MAK) are often provided, which allow for a higher number of activations but are still limited.
  • License Type: Retail licenses, which are often used in MSDN, allow for multiple activations, particularly on different hardware, but technically, they are for one device at a time.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro 25H2 (26200.6901)
    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
  • Operating System
    Windows 11 Pro 25H2 (26200.8246)
    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
I tried three valid Win11 Pro keys, all of them get the same error.
I have read that Microsoft specifically does not provide for 'validating' a key by any method aside from activating a Windows instance. The reasoning seems simple enough: they don't want to create an incentive for the creation of apps that could be used, or subverted, for stealing keys.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    DIY
    CPU
    Ryzen 7 5800X
    Motherboard
    Gigabyte B550M Aorus Pro
    Memory
    GSkill 3200, 2x8GB
    Graphics Card(s)
    MSI RX 6800 XT Gaming Z
    Sound Card
    on-board Realtek
    Monitor(s) Displays
    MSI 180hz
    Screen Resolution
    1440p
    Hard Drives
    Samsung 980 Pro, Samsung 870 Evo, generic PCIe NVME, WD 1TB 2.5" laptop spinner
    PSU
    Corsair RM 650
    Case
    mATX
    Cooling
    BeQuiet 240mm AIO and a bunch of case fans
    Keyboard
    one that clacks softly
    Mouse
    logitech
    Internet Speed
    bunches of bps
    Browser
    Firefox
    Antivirus
    Windows' own
  • Operating System
    Win11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    DIY
    CPU
    Ryzen 7 1700
    Motherboard
    GA-AB350M G-3
    Memory
    16GB DDR4
    Graphics card(s)
    RX-480
    Sound Card
    In-Built Realtek
    Monitor(s) Displays
    Samsung
    Screen Resolution
    1440p
    Hard Drives
    NVME/SSD's
    PSU
    Thermaltake BX1 550W
    Case
    Some junky thing
    Cooling
    ThermalTake Assassin(?)
    Browser
    FF/Edge
    Antivirus
    Whatever Windows does
    Other Info
    Secure Boot enabled updated to 2023 CA keys, TPM2.0 enabled with system drive Bitlocker'd.
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