KB5066835 Install error 0x80074101


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C:\Windows\Logs\CBS\CBS.log
 

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Windows 10Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz16 GB Total: Manufacturer : Samsung MemoryTyp...NVIDIA Quadro K3100M; Intel(R) HD Graphics 4600
OS
Windows 10
Computer type
Laptop
Manufacturer/Model
HP
CPU
Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz
Motherboard
Product : 190A Version : KBC Version 94.56
Memory
16 GB Total: Manufacturer : Samsung MemoryType : DDR3 FormFactor : SODIMM Capacity : 8GB Speed : 1600
Graphics Card(s)
NVIDIA Quadro K3100M; Intel(R) HD Graphics 4600
Sound Card
IDT High Definition Audio CODEC; PNP Device ID HDAUDIO\FUNC_01&VEN_111D&DEV_76E0
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Model Hitachi HTS727575A9E364
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Microsoft Defender
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Mobile Workstation

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Windows 11 ProIntel Core i7-11700k16GB Patriot Viper Steel @ DDR4-3200RTX2070
OS
Windows 11 Pro
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PC/Desktop
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ASUS z590
CPU
Intel Core i7-11700k
Motherboard
ASUS z590
Memory
16GB Patriot Viper Steel @ DDR4-3200
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RTX2070
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Sony XBR65Z9D
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1TB Crucial T500 M.2 PCIe Gen4 + many SATA + many USB
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AS Rock Steel Legend 850W
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Silverstone
0x80074101 - Unknown Error

2025-10-19 14:06:05, Info CBS Exec: Processing complete. Session: 31211836_127673607, Package: Package_for_RollupFix~31bf3856ad364e35~amd64~~26100.6899.1.25, Identifier: KB5066835 [HRESULT = 0x80074101 - Unknown Error]
2025-10-19 14:06:05, Error CBS Failed to perform operation. [HRESULT = 0x80074101 - Unknown Error]
 

My Computer My Computer

At a glance

Windows 10Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz16 GB Total: Manufacturer : Samsung MemoryTyp...NVIDIA Quadro K3100M; Intel(R) HD Graphics 4600
OS
Windows 10
Computer type
Laptop
Manufacturer/Model
HP
CPU
Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz
Motherboard
Product : 190A Version : KBC Version 94.56
Memory
16 GB Total: Manufacturer : Samsung MemoryType : DDR3 FormFactor : SODIMM Capacity : 8GB Speed : 1600
Graphics Card(s)
NVIDIA Quadro K3100M; Intel(R) HD Graphics 4600
Sound Card
IDT High Definition Audio CODEC; PNP Device ID HDAUDIO\FUNC_01&VEN_111D&DEV_76E0
Hard Drives
Model Hitachi HTS727575A9E364
Antivirus
Microsoft Defender
Other Info
Mobile Workstation
I had this issue. It failed on the Patch Tuesday build, so then I tried the one they released today, same result. I ended up downloading a 25h2 ISO and did an in-place upgrade, which resolved it.

It doesn't really matter that I'm not part of the 'Insider' program, we're all beta testers nowadays. MS has horrible quality control.
 

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System One System Two

  • At a glance

    Windows 11 ProIntel Core i7 10700KIntel UHD Graphics 630
    OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    built myself
    CPU
    Intel Core i7 10700K
    Motherboard
    MSI Z490-A Pro
    Graphics Card(s)
    Intel UHD Graphics 630
    Antivirus
    Microsoft Defender
    Other Info
    TPM 2.0

  • At a glance

    Windows 11 ProIntel Core i7 6800KNVIDIA GeForce GTX 1050 Ti
    Operating System
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    built myself
    CPU
    Intel Core i7 6800K
    Motherboard
    Asus X99-E
    Graphics card(s)
    NVIDIA GeForce GTX 1050 Ti
    Antivirus
    Microsoft Defender
    Other Info
    no TPM
kjlkjadfasdfasd said:
It doesn't really matter that I'm not part of the 'Insider' program, we're all beta testers nowadays. MS has horrible quality control.
Click to expand...
Well, you'll have a hard time getting an argument about that! :LOL:
 

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System One System Two Other systems

  • At a glance

    Win 11 Pro 25H2, Build 26200.8973Intel Core i5 1450064GB DDR4GeForce RTX 4060
    OS
    Win 11 Pro 25H2, Build 26200.8973
    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!
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    Microsoft Comfort Curve 2000
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    Logitech G305
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    Verizon FiOS 1GB
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    Firefox
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    Malware Bytes & Windows Defender Security

  • At a glance

    Win 11 Pro 25H2, Build 26200.8894Intel Core i5 1440032GB DDR5Intel 700 Embedded GPU
    Operating System
    Win 11 Pro 25H2, Build 26200.8894
    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
  • Nimo N171 17" Laptop, (Intel i3-1215U, 16GB RAM, 2TB NVMe, Win11 Pro)
    Acemagic Vista Mini PC V1 (Intel N150, 16GB RAM, 1TB NVMe, Win11 Pro)
    HP ENVY h8-1540t, (24GB RAM, 2TB SSD, 2TB HDD, Win11 Pro)
Noticed there's a new update KB5070773 (26200.6901). So I used the MS "hide updates tool" to hide KB5066835, then successfully updated to 26200.6901
 

My Computer My Computer

At a glance

Windows 11 ProIntel Core i7-11700k16GB Patriot Viper Steel @ DDR4-3200RTX2070
OS
Windows 11 Pro
Computer type
PC/Desktop
Manufacturer/Model
ASUS z590
CPU
Intel Core i7-11700k
Motherboard
ASUS z590
Memory
16GB Patriot Viper Steel @ DDR4-3200
Graphics Card(s)
RTX2070
Monitor(s) Displays
Sony XBR65Z9D
Hard Drives
1TB Crucial T500 M.2 PCIe Gen4 + many SATA + many USB
PSU
AS Rock Steel Legend 850W
Case
Silverstone
Two of the last three updates have failed on my machine. Mine gets hung up on the restart and ends up rolling back. I was able to complete the update with a painful repair by reinstall using UUP Dump. 6901 (yesterday) failed to install but I'm now up and running again. I'm not sure what the issue is...my machine or Microsoft Update.
 

My Computers My Computers

System One System Two

  • At a glance

    Windows 11Intel i7-7700K32GB 2666Mhz (Kingston Hyper X Fury)Asus Nvidia 1050Ti
    OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom
    CPU
    Intel i7-7700K
    Motherboard
    Asus Prime Z-270A
    Memory
    32GB 2666Mhz (Kingston Hyper X Fury)
    Graphics Card(s)
    Asus Nvidia 1050Ti
    Sound Card
    N/A
    Monitor(s) Displays
    Samsung C27F390
    Screen Resolution
    1920 x 1080
    Hard Drives
    1TB Western Digital SN770 (System) and 2TB Western Digital SN770 (Storage)
    Antivirus
    Windows Security

  • At a glance

    Windows 11 Homei9-11900H32GBIntegrated Intel and Nvidia 3050Ti
    Operating System
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Dell/XPS 15 9510
    CPU
    i9-11900H
    Motherboard
    Unknown
    Memory
    32GB
    Graphics card(s)
    Integrated Intel and Nvidia 3050Ti
    Sound Card
    Integrated (Realtek)
    Monitor(s) Displays
    None
    Screen Resolution
    1920 x 1200 (non-Touch)
    Hard Drives
    2TB SK Hynix P41 Platinum
    Antivirus
    Windows Security
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