Outlook does not allow me to open PDFs


N

NFP

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Prior to a couple of days ago, I could quite happily open received PDFs in Outlook.
I now receive the annoying message below:

1725031110169.png

Running Office 2021 v2408 (Build 17928.20114 Click to run) and Acrobat 24.003.20054.

Has either Outlook or Acrobat changed some security setting?
 

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Windows 11 Pro (64-bit) Version 25H2 (26200.6...13th Gen Intel(R) Core(TM) i7-137002.10 GHz Installed RAM 32.0 GBIntel® UHD Graphics 770
OS
Windows 11 Pro (64-bit) Version 25H2 (26200.6901)
Computer type
PC/Desktop
Manufacturer/Model
Device name WINDOWS-IFK07HH Processor Product ID00355-61301-79382-AAOEM System type 64-bit operating system, x64-based processor
CPU
13th Gen Intel(R) Core(TM) i7-13700
Motherboard
ASUS PRIME H610M-A WIFI D4
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Graphics Card(s)
Intel® UHD Graphics 770
Sound Card
Realtek High Definition Audio
Hard Drives
Samsung SSD 870 QVO 1TB
Samsung SSD 980 1TB
When I've seen a similar message it was because the antivirus/antimalware program couldn't open the file directly to scan but could after saving it to a folder. It's also possible a conflict exists between Microsoft Security/Windows Defender and a third-party installed program.
 

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System One System Two

  • At a glance

    Win11 Pro RTM Version 24H2 Build 26100.4202Intel Core i5 11th Gen. 2.40GHz12GB
    OS
    Win11 Pro RTM Version 24H2 Build 26100.4202
    Computer type
    Laptop
    Manufacturer/Model
    Dell Vostro 3400
    CPU
    Intel Core i5 11th Gen. 2.40GHz
    Memory
    12GB
    Hard Drives
    256GB SSD NVMe M.2

  • At a glance

    Win11 Pro RTM Version 24H2 Build 26100.4202Intel Core i5 10th Gen. 2.90GHz16GBOnboard, no VGA, using a DisplayPort-to-VGA a...
    Operating System
    Win11 Pro RTM Version 24H2 Build 26100.4202
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Vostro 5890
    CPU
    Intel Core i5 10th Gen. 2.90GHz
    Memory
    16GB
    Graphics card(s)
    Onboard, no VGA, using a DisplayPort-to-VGA adapter
    Monitor(s) Displays
    24" Dell
    Hard Drives
    512GB SSD NVMe, 4TB Seagate HDD
    Browser
    Firefox, Edge
    Antivirus
    Windows Defender/Microsoft Security
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Berton said:
When I've seen a similar message it was because the antivirus/antimalware program couldn't open the file directly to scan but could after saving it to a folder. It's also possible a conflict exists between Microsoft Security/Windows Defender and a third-party installed program.
Click to expand...
Many thanks for your suggestion, I am only running Defender and Malwarebytes. I have discovered that if I double click the PDF (in Outlook), I receive the above message. However, If I right click and select open with Acrobat, the PDF opens.
If I try right clicking and select preview, I receive the message that "This file cannot be previewed. Try opening the file in the program in which it was created".
This possibly suggests to me that the problem lies within Outlook.
 

My Computer My Computer

At a glance

Windows 11 Pro (64-bit) Version 25H2 (26200.6...13th Gen Intel(R) Core(TM) i7-137002.10 GHz Installed RAM 32.0 GBIntel® UHD Graphics 770
OS
Windows 11 Pro (64-bit) Version 25H2 (26200.6901)
Computer type
PC/Desktop
Manufacturer/Model
Device name WINDOWS-IFK07HH Processor Product ID00355-61301-79382-AAOEM System type 64-bit operating system, x64-based processor
CPU
13th Gen Intel(R) Core(TM) i7-13700
Motherboard
ASUS PRIME H610M-A WIFI D4
Memory
2.10 GHz Installed RAM 32.0 GB
Graphics Card(s)
Intel® UHD Graphics 770
Sound Card
Realtek High Definition Audio
Hard Drives
Samsung SSD 870 QVO 1TB
Samsung SSD 980 1TB
NFP said:
This possibly suggests to me that the problem lies within Outlook
Click to expand...
Possibly. I mostly use Webmail and no issue with the .pdf file attachments.
 

My Computers My Computers

System One System Two

  • At a glance

    Win11 Pro RTM Version 24H2 Build 26100.4202Intel Core i5 11th Gen. 2.40GHz12GB
    OS
    Win11 Pro RTM Version 24H2 Build 26100.4202
    Computer type
    Laptop
    Manufacturer/Model
    Dell Vostro 3400
    CPU
    Intel Core i5 11th Gen. 2.40GHz
    Memory
    12GB
    Hard Drives
    256GB SSD NVMe M.2

  • At a glance

    Win11 Pro RTM Version 24H2 Build 26100.4202Intel Core i5 10th Gen. 2.90GHz16GBOnboard, no VGA, using a DisplayPort-to-VGA a...
    Operating System
    Win11 Pro RTM Version 24H2 Build 26100.4202
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Vostro 5890
    CPU
    Intel Core i5 10th Gen. 2.90GHz
    Memory
    16GB
    Graphics card(s)
    Onboard, no VGA, using a DisplayPort-to-VGA adapter
    Monitor(s) Displays
    24" Dell
    Hard Drives
    512GB SSD NVMe, 4TB Seagate HDD
    Browser
    Firefox, Edge
    Antivirus
    Windows Defender/Microsoft Security

My Computer My Computer

At a glance

Windows 11
OS
Windows 11
Computer type
Laptop
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Is Adobe PDF doohickie set as the default PDF viewer?
 

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  • At a glance

    Windows 11 Enterprise 25H2 26200 7462Intel XEON E5-2699 v364GB Teamgroup UD4-3600NVIDIA GeForce GTX 1080 Ti
    OS
    Windows 11 Enterprise 25H2 26200 7462
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom Build
    CPU
    Intel XEON E5-2699 v3
    Motherboard
    ASUS X99-A
    Memory
    64GB Teamgroup UD4-3600
    Graphics Card(s)
    NVIDIA GeForce GTX 1080 Ti
    Sound Card
    Integrated
    Monitor(s) Displays
    ACER X34 Predator
    Screen Resolution
    3440 x 1440
    Hard Drives
    Crucial CT1000P 3P SSD8 1TB
    Crucial CT1000 BX500 SSD 1TB
    PSU
    GameMax Pro
    Case
    Fractal Design
    Cooling
    Corsair H110iGT + 6 140mm Fans
    Keyboard
    Corsair K4
    Mouse
    G-Skill G502
    Internet Speed
    300MBs
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    OEM
    Other Info
    ASUS RT-AC87U Router

  • At a glance

    25H2 26200.50748GB
    Operating System
    25H2 26200.5074
    Computer type
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    Manufacturer/Model
    ASUS X555LA
    Memory
    8GB
    Browser
    Chrome
    Antivirus
    OEM
BruceR said:
Two potential and fixable causes:

Outlook PDF preview error: This file cannot be previewed because there is no previewer installed for it
Click to expand...
Thanks for your suggestion: both Acrobat & Office are 64-bit versions, and I do not have Microsoft PowerToys installed.
I have tried a repair install on both Acrobat & Office, to no joy!
Rollback_Jockey said:
Is Adobe PDF doohickie set as the default PDF viewer?
Click to expand...
Yes, Adobe is set as the default PDF viewer.
 

My Computer My Computer

At a glance

Windows 11 Pro (64-bit) Version 25H2 (26200.6...13th Gen Intel(R) Core(TM) i7-137002.10 GHz Installed RAM 32.0 GBIntel® UHD Graphics 770
OS
Windows 11 Pro (64-bit) Version 25H2 (26200.6901)
Computer type
PC/Desktop
Manufacturer/Model
Device name WINDOWS-IFK07HH Processor Product ID00355-61301-79382-AAOEM System type 64-bit operating system, x64-based processor
CPU
13th Gen Intel(R) Core(TM) i7-13700
Motherboard
ASUS PRIME H610M-A WIFI D4
Memory
2.10 GHz Installed RAM 32.0 GB
Graphics Card(s)
Intel® UHD Graphics 770
Sound Card
Realtek High Definition Audio
Hard Drives
Samsung SSD 870 QVO 1TB
Samsung SSD 980 1TB
Uninstall Adobe, reboot and reinstall.
 

My Computers My Computers

System One System Two

  • At a glance

    Windows 11 Enterprise 25H2 26200 7462Intel XEON E5-2699 v364GB Teamgroup UD4-3600NVIDIA GeForce GTX 1080 Ti
    OS
    Windows 11 Enterprise 25H2 26200 7462
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom Build
    CPU
    Intel XEON E5-2699 v3
    Motherboard
    ASUS X99-A
    Memory
    64GB Teamgroup UD4-3600
    Graphics Card(s)
    NVIDIA GeForce GTX 1080 Ti
    Sound Card
    Integrated
    Monitor(s) Displays
    ACER X34 Predator
    Screen Resolution
    3440 x 1440
    Hard Drives
    Crucial CT1000P 3P SSD8 1TB
    Crucial CT1000 BX500 SSD 1TB
    PSU
    GameMax Pro
    Case
    Fractal Design
    Cooling
    Corsair H110iGT + 6 140mm Fans
    Keyboard
    Corsair K4
    Mouse
    G-Skill G502
    Internet Speed
    300MBs
    Browser
    Chrome
    Antivirus
    OEM
    Other Info
    ASUS RT-AC87U Router

  • At a glance

    25H2 26200.50748GB
    Operating System
    25H2 26200.5074
    Computer type
    Laptop
    Manufacturer/Model
    ASUS X555LA
    Memory
    8GB
    Browser
    Chrome
    Antivirus
    OEM
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Reactions: NFP
Rollback_Jockey said:
Uninstall Adobe, reboot and reinstall.
Click to expand...
Many thanks for your advice; uninstalled, rebooted and I had lost the ability to even right click and select open with Acrobat.
I just decided to revert to a previous Macrium back up, and every this is working as it was. For the present time, I will delay updating both Office & Acrobat.

May I thank all of you who have contributed to this thread - as far as I am concerned, this situation is resolved 😊
 

My Computer My Computer

At a glance

Windows 11 Pro (64-bit) Version 25H2 (26200.6...13th Gen Intel(R) Core(TM) i7-137002.10 GHz Installed RAM 32.0 GBIntel® UHD Graphics 770
OS
Windows 11 Pro (64-bit) Version 25H2 (26200.6901)
Computer type
PC/Desktop
Manufacturer/Model
Device name WINDOWS-IFK07HH Processor Product ID00355-61301-79382-AAOEM System type 64-bit operating system, x64-based processor
CPU
13th Gen Intel(R) Core(TM) i7-13700
Motherboard
ASUS PRIME H610M-A WIFI D4
Memory
2.10 GHz Installed RAM 32.0 GB
Graphics Card(s)
Intel® UHD Graphics 770
Sound Card
Realtek High Definition Audio
Hard Drives
Samsung SSD 870 QVO 1TB
Samsung SSD 980 1TB
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