Security Updates on days when Windows pc is not turned on


mackie

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There are days when I don't turn on the Windows 11 pc and so security updates for Microsoft Defender Antivirus are not downloaded/installed on those days. Then when I turn the pc on and check Windows Update, there will be a security update for that day which will install. What happened to the security definitions for those days when the computer was off? Are they lost because the pc was not available? When I go into WU > Update History > Definition Updates I can see the gaps when the computer was off.
 

My Computer

System One

  • OS
    Windows 11/Linux Mint
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Optiplex 960
    CPU
    Intel Core 2 Duo CPU E8400 @ 3.00 GHz x 2
    Memory
    8 GB
    Graphics Card(s)
    Intel 4 Series Chipset Integrated Graphics Controller
    Monitor(s) Displays
    HP x22LED
    Hard Drives
    Crucial 250 GB SSD, HD 1Tb
The updates are cumulative - they contain the previous updates.
 

My Computer

System One

  • OS
    Windows 11 Pro 64bit
    Computer type
    Laptop
    Manufacturer/Model
    PC Specialist Optimus VII V17-960 Gaming Laptop.
    CPU
    6th Gen Intel Core i7-6700HQ Quad Core processor.
    Memory
    16GB HyperX IMPACT 1600MHz SODIMM DDR3 (2 x 8GB)
    Graphics Card(s)
    NVIDIA® GeForce® GTX 960M - 2.0GB DDR5 Video RAM - DirectX® 12
    Sound Card
    Intel 2 Channel High Def. Audio + SoundBlaster™ Cinema 2 & Realtek
    Monitor(s) Displays
    Optimus Series: 17.3" Matte Full HD IPS LED Widescreen (1920x1080)
    Screen Resolution
    Full HD IPS display (1920 x 1080).
    Hard Drives
    4TB SSD (internal).
    1x 1TB & 1x 5TB external HDDs.
    Cooling
    STANDARD THERMAL PASTE FOR SUFFICIENT COOLING
    Keyboard
    Logitech K800 wireless keyboard
    Mouse
    Logitech M705 wireless mouse
    Internet Speed
    Upto 100Mbps
    Browser
    Edge.
    Antivirus
    Windows Defender & MalwareBytes pro.
Maybe this will clear it up a bit:

"When updates are published, some logic is applied to minimize the size of the update. In most cases, only the differences between the latest update and the update that is currently installed (the set of differences is referred to as the delta) on the device is downloaded and applied. However, the size of the delta depends on two main factors:

  • The age of the last update on the device; and
  • The source used to download and apply updates.
The older the updates on an endpoint, the larger the download is. However, you must also consider download frequency as well. A more frequent update schedule can result in more network usage, whereas a less-frequent schedule can result in larger file sizes per download." [Microsoft]

In theory, you get what you need.
 

My Computers

System One System Two

  • OS
    11 Pro 23H2 22631.3447
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i7-9700 @ 3.00GHz
    Motherboard
    Lenovo 3132
    Memory
    32GBDDR4 @ 2666MHz
    Graphics Card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek HD Audio
    Monitor(s) Displays
    LG E2442
    Screen Resolution
    1920x1080
    Hard Drives
    1 x Samsung 970 EVO PLUS 500GB NVMe SSD, 1 x WD_BLACK SN770
    250GB NVMe SSD (OS and programs), 1 x WD_BLACK SN770
    500GB NVMe SSD (Data)
    Case
    Lenovo SFF
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Mouse
    LogiTech M510 wireless
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome, sometimes Firefox
    Antivirus
    Malwarebytes Premium & Defender (working together beautifully!)
  • Operating System
    11 Pro 23H2 22631.3447
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i5-8400 @ 2.80GHz
    Motherboard
    Lenovo 3132
    Memory
    32GB DDR4 @ 2600MHz
    Graphics card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek High Definition Audio onboard
    Monitor(s) Displays
    LG FULL HD (1920x1080@59Hz)
    Screen Resolution
    1920 x 1080
    Hard Drives
    1 x Samsung 970 EVO PLUS NVMe; 1 x Samsung 980 NVMe SSD
    Case
    Lenovo Think Centre SFF
    Mouse
    LogiTech M510 wireless
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome
    Antivirus
    Malwarebytes Premium and MS Defender, beautiful together
Is it also the case that Windows Defender updates to the Engine and Platform, which I believe are monthly, are done via Windows Update or can they be installed, when released, by opening Windows Security/Virus Protection and manually checking for updates? I had a few issues with Definitions not being installed if checking via WU, so I manually check for them on Windows Security. Would the updates to the Engine and Platform be installed if I manually checked in Windows Security? Thanks
 

My Computer

System One

  • OS
    Windows 11 Home
For further reading, and info quoted in post 3, go here.
 

My Computers

System One System Two

  • OS
    Windows 11 Home, ver 23H2 build 22631.2428
    Computer type
    Laptop
    Manufacturer/Model
    Hewlett-Packard Spectre 13-4001 x360 convertable
    CPU
    Intel Core i5 5200U @ 2.20GH
    Motherboard
    Hewlett-Packard 802D
    Memory
    4 GB
    Graphics Card(s)
    Intel HD Graphics 5500 on board
    Sound Card
    Intel Smart Sound Technology (Intel SST)
    Hard Drives
    ADATA SSD 128GB, model AXNS381E-128GM-B (SATA 6.0 Gb/s
    Keyboard
    Model # G01KB
    Antivirus
    Microsoft Defender
    Other Info
    born on date: 25 Feb 2016
  • Operating System
    Win 10 22H2 build 19045.3693
    Computer type
    PC/Desktop
    Manufacturer/Model
    Asus Desktop model M32AD-US019S (new 2015)
    CPU
    Intel Core i7 4th Gen 4790 (3.60GHz), Haswell 22nm Technology, SOCKET 1150
    Motherboard
    H81M-E/M51AD/DP_MB
    Memory
    16 GB (8GB in 2 modules)
    Graphics card(s)
    NVIDIA GeForce GTX 760, 3GB
    Monitor(s) Displays
    HP EliteDisplay E241i LED; HP EliteDisplay E243
    Hard Drives
    Samsung 500GB SSD, 870 EVO (SATA 6.0 )
    Micron 250GB SSD, CT250MX500
    Toshiba HDD, 3GB (original drive w/PC)
    Case
    ASUS
    Keyboard
    ASUS-------------------------
    Antivirus
    MS Defender
Thanks. I'll check when the next Engine and Platform updates are released and try installing them through Windows Security/Virus & Threat Prot/ Manually Check For Updates before Windows Update.
 

My Computer

System One

  • OS
    Windows 11 Home
I'm going to assume then that the next cumulative update bundles and installs all the security definitions issued since the previous cumulative and that should take care of any that I might miss daily if the pc is not turned on. I'm basing this on MS comment about security updates as well as fixes, etc., being included in a cumulative.

Still open for responses to @Mitch question ......

Ok..... @Mitch...... see you have a response.... maybe you can come back here and let us know what you find in history when the opportunity presents.
 

My Computer

System One

  • OS
    Windows 11/Linux Mint
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Optiplex 960
    CPU
    Intel Core 2 Duo CPU E8400 @ 3.00 GHz x 2
    Memory
    8 GB
    Graphics Card(s)
    Intel 4 Series Chipset Integrated Graphics Controller
    Monitor(s) Displays
    HP x22LED
    Hard Drives
    Crucial 250 GB SSD, HD 1Tb
I'm going to assume then that the next cumulative update bundles and installs all the security definitions issued since the previous cumulative and that should take care of any that I might miss daily if the pc is not turned on.
Correct. The cumulative will add what's missing but won't overwrite anything that's there already.
 

My Computers

System One System Two

  • OS
    11 Pro 23H2 22631.3447
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i7-9700 @ 3.00GHz
    Motherboard
    Lenovo 3132
    Memory
    32GBDDR4 @ 2666MHz
    Graphics Card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek HD Audio
    Monitor(s) Displays
    LG E2442
    Screen Resolution
    1920x1080
    Hard Drives
    1 x Samsung 970 EVO PLUS 500GB NVMe SSD, 1 x WD_BLACK SN770
    250GB NVMe SSD (OS and programs), 1 x WD_BLACK SN770
    500GB NVMe SSD (Data)
    Case
    Lenovo SFF
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Mouse
    LogiTech M510 wireless
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome, sometimes Firefox
    Antivirus
    Malwarebytes Premium & Defender (working together beautifully!)
  • Operating System
    11 Pro 23H2 22631.3447
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i5-8400 @ 2.80GHz
    Motherboard
    Lenovo 3132
    Memory
    32GB DDR4 @ 2600MHz
    Graphics card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek High Definition Audio onboard
    Monitor(s) Displays
    LG FULL HD (1920x1080@59Hz)
    Screen Resolution
    1920 x 1080
    Hard Drives
    1 x Samsung 970 EVO PLUS NVMe; 1 x Samsung 980 NVMe SSD
    Case
    Lenovo Think Centre SFF
    Mouse
    LogiTech M510 wireless
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome
    Antivirus
    Malwarebytes Premium and MS Defender, beautiful together
Correct. The cumulative will add what's missing but won't overwrite anything that's there already.
Got it.......... and thank you!

Also... I guess one could say that my pc is vulnerable to those missing definitions until the next cumulative is installed.
 

My Computer

System One

  • OS
    Windows 11/Linux Mint
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Optiplex 960
    CPU
    Intel Core 2 Duo CPU E8400 @ 3.00 GHz x 2
    Memory
    8 GB
    Graphics Card(s)
    Intel 4 Series Chipset Integrated Graphics Controller
    Monitor(s) Displays
    HP x22LED
    Hard Drives
    Crucial 250 GB SSD, HD 1Tb
Hi @mackie . I've only started using Defender since the clean install a couple of weeks ago. I had problems installing Defender updates which appeared when checking WU. I used Norton 360 but couldn't manually install these updates as Norton takes over and blocks access to Defender. I have no update history since the clean install but the next engine and platform update is probably due in the next week. Will see what happens.
 

My Computer

System One

  • OS
    Windows 11 Home
Hi @mackie . I've only started using Defender since the clean install a couple of weeks ago. I had problems installing Defender updates which appeared when checking WU. I used Norton 360 but couldn't manually install these updates as Norton takes over and blocks access to Defender. I have no update history since the clean install but the next engine and platform update is probably due in the next week. Will see what happens.
I've been using MS security since Windows 7 and have not had security problems. I think the last time I used another security software was during the Vista days. Did you uninstall Norton before or after the clean Windows install and start of Defender?
 

My Computer

System One

  • OS
    Windows 11/Linux Mint
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Optiplex 960
    CPU
    Intel Core 2 Duo CPU E8400 @ 3.00 GHz x 2
    Memory
    8 GB
    Graphics Card(s)
    Intel 4 Series Chipset Integrated Graphics Controller
    Monitor(s) Displays
    HP x22LED
    Hard Drives
    Crucial 250 GB SSD, HD 1Tb
Hi @mackie . I tried a repair install first with Norton in place bur the Defender definitions still didn't install. I then uninstalled Norton and Reflect (to remove the licence) and did a clean install. I didn't reinstall Norton (on this PC) although Norton is on 2 others. If you use Norton, you have no access to Defender settings and manual updates unless you uninstall Norton. This desktop PC is different from the other 2. If I run WU check it will download definition updates which appear in Update History- in the other 2, no definitions are downloaded and don't appear in Reliability Monitor which shows installations. No one, seems to know why this is as all 3 PCs were setup the same way. Regards.
 

My Computer

System One

  • OS
    Windows 11 Home
I saw where you recently opened a post on this problem, so for continuity purpose I'm going to quote your reply there.

 

My Computer

System One

  • OS
    Windows 11/Linux Mint
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Optiplex 960
    CPU
    Intel Core 2 Duo CPU E8400 @ 3.00 GHz x 2
    Memory
    8 GB
    Graphics Card(s)
    Intel 4 Series Chipset Integrated Graphics Controller
    Monitor(s) Displays
    HP x22LED
    Hard Drives
    Crucial 250 GB SSD, HD 1Tb
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