Win 11 security won't let me add a Virtual drive letter in File Explorer.


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GerryPeters

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I have a Macrium Reflect image and if I double click it it will let me view the contents of the image in a Virtual drive letter in File Explorer. Win 10 allows this but Win 11 has security that prevents this. How can I fix this?

Google AI had me put this in Command prompt administrator and reboot, but there's more security hurdles to jump through

reg add "HKLM\SYSTEM\CurrentControlSet\Control\CI\Config" /v "VulnerableDriverBlocklistEnable" /t REG_DWORD /d 0 /f
 

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  • At a glance

    WIN 11 PROIntel(R) Core(TM) i5-14400 2.50 Ghz,32 Gigs
    OS
    WIN 11 PRO
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom built - WIN 11 PRO 64-bit ,
    CPU
    Intel(R) Core(TM) i5-14400 2.50 Ghz,
    Motherboard
    ACER Z790 motherboard
    Memory
    32 Gigs
    Hard Drives
    256 gig M2 SSD boot HD, 3 internal HD's, 2 USB

  • At a glance

    Win 10 PROHaswell CPU 4790k @ 4.4GHz,16 Gigs
    Operating System
    Win 10 PRO
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    Manufacturer/Model
    CUSTOM
    CPU
    Haswell CPU 4790k @ 4.4GHz,
    Motherboard
    AsRock Z97 motherboard,
    Memory
    16 Gigs
    Hard Drives
    OS drive 250GB SSD,
Hi, is what you're reporting actually this?
Windows 11 updates (such as KB5083769) block the psmounterex.sys driver used by Macrium Reflect 8 to mount backup images as virtual drives. Your actual backup files are safe and can still be restored via rescue media, Windows Update Breaks Macrium Reflect Free. [1, 2, 3]

Why This Happens
  • Blocked Driver: Microsoft added the psmounterex.sys driver to its Vulnerable Driver Blocklist in recent security updates.
  • Affected Versions: This primarily impacts Macrium Reflect 8.1 and the older free version. Newer versions like Macrium Reflect X do not use this blocked driver.
Click to expand...

If so this was extensively discussed months ago when it was first noticed.

If you're using a more recent build of MR, please say which, and post the error message. Thanks.
 

My Computer My Computer

At a glance

Windows 11 Proi7-8650U16GBIntel UHD 620
OS
Windows 11 Pro
Computer type
Laptop
Manufacturer/Model
Lenovo t480s
CPU
i7-8650U
Memory
16GB
Graphics Card(s)
Intel UHD 620
Screen Resolution
1920x1080
Hard Drives
C SN810 SDCPNRY-512G-1006
Browser
Edge, Firefox
Antivirus
Defender
I'm using Macrium 8.0 free. I don't get an error message it just doesn't do anything, yet Win 10 at least opens the F drive but won't let me view the User folder
 

My Computers My Computers

System One System Two

  • At a glance

    WIN 11 PROIntel(R) Core(TM) i5-14400 2.50 Ghz,32 Gigs
    OS
    WIN 11 PRO
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom built - WIN 11 PRO 64-bit ,
    CPU
    Intel(R) Core(TM) i5-14400 2.50 Ghz,
    Motherboard
    ACER Z790 motherboard
    Memory
    32 Gigs
    Hard Drives
    256 gig M2 SSD boot HD, 3 internal HD's, 2 USB

  • At a glance

    Win 10 PROHaswell CPU 4790k @ 4.4GHz,16 Gigs
    Operating System
    Win 10 PRO
    Computer type
    PC/Desktop
    Manufacturer/Model
    CUSTOM
    CPU
    Haswell CPU 4790k @ 4.4GHz,
    Motherboard
    AsRock Z97 motherboard,
    Memory
    16 Gigs
    Hard Drives
    OS drive 250GB SSD,
GerryPeters said:
I'm using Macrium 8.0 free. I don't get an error message it just doesn't do anything, yet Win 10 at least opens the F drive but won't let me view the User folder
Click to expand...
Not seeing that problem here on Windows 11 and Macrium X. The Users folder is protected by Windows but can be opened if you use an Admin account.
 

My Computer My Computer

At a glance

Windows 11 Pro 25H2 (RP channel)AMD Ryzen 7 9800X3D 8-core64GB Corsair Titanium 6000/CL30MSI Suprim 5080 SOC
OS
Windows 11 Pro 25H2 (RP channel)
Computer type
PC/Desktop
Manufacturer/Model
MSI
CPU
AMD Ryzen 7 9800X3D 8-core
Motherboard
MEG X870E Godlike
Memory
64GB Corsair Titanium 6000/CL30
Graphics Card(s)
MSI Suprim 5080 SOC
Sound Card
Soundblaster AE-9
Monitor(s) Displays
ASUS TUF Gaming VG289Q
Screen Resolution
3840x2160
Hard Drives
Samsung 9100 Pro 4TB (gen 5 x4, system drive/games)
Samsung 990 Pro 2TB
Samsung 980 Pro 2TB
Samsung 870 Evo 4TB
Samsung 870 Evo 2TB
Samsung T9 4TB
PSU
Seasonic PX-2200
Case
Bequiet! Dark Base Pro 901
Cooling
Noctua NH-D15S Chromax black
Keyboard
Logitech G915 X (wired)
Mouse
Logitech G903 with PowerPlay charger
Internet Speed
900Mb/sec
Browser
Microsoft Edge
Antivirus
Windows Defender
GerryPeters said:
I'm using Macrium 8.0 free. I don't get an error message it just doesn't do anything, yet Win 10 at least opens the F drive but won't let me view the User folder
Click to expand...
Thank you for your reply.

I have already explained what you're seeing. If you had followed my hint and read about it elsewhere on Windows 11 you wouldn't be posting back with the same problem.

Why?

Mounting an image on Win 11 with older versions of Macrium Reflect no longer works.

Macrium Reflect X (current version) does that a different way and does not use the driver Win 11 (MS) blocks.

Workarounds (of a kind) were posted in discussions on this months ago. That includes using MR's boot disk.
 

My Computer My Computer

At a glance

Windows 11 Proi7-8650U16GBIntel UHD 620
OS
Windows 11 Pro
Computer type
Laptop
Manufacturer/Model
Lenovo t480s
CPU
i7-8650U
Memory
16GB
Graphics Card(s)
Intel UHD 620
Screen Resolution
1920x1080
Hard Drives
C SN810 SDCPNRY-512G-1006
Browser
Edge, Firefox
Antivirus
Defender

My Computers My Computers

System One System Two Other systems

  • At a glance

    Windows 11 Pro 26H2 26300.9457i9-10900 10 core 20 threads32 gbnone-Intel UHD Graphics 630
    OS
    Windows 11 Pro 26H2 26300.9457
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Optiplex 7080
    CPU
    i9-10900 10 core 20 threads
    Motherboard
    DELL 0J37VM
    Memory
    32 gb
    Graphics Card(s)
    none-Intel UHD Graphics 630
    Sound Card
    Integrated Realtek
    Monitor(s) Displays
    Benq 27
    Screen Resolution
    2560x1440
    Hard Drives
    2x1tb Solidigm m.2 nvme /External drives 512gb Samsung m.2 sata+2tb Kingston m2.nvme
    PSU
    500w
    Case
    MT
    Cooling
    Dell Premium
    Keyboard
    Logitech wired
    Mouse
    Logitech wireless
    Internet Speed
    so slow I'm too embarrassed to tell
    Browser
    #1 Edge #2 Firefox
    Antivirus
    Defender+MWB Premium

  • At a glance

    Windows 11 Pro 24H2 26200.9457AMD Ryzen 7 6800U32 gbintegrated
    Operating System
    Windows 11 Pro 24H2 26200.9457
    Computer type
    PC/Desktop
    Manufacturer/Model
    Beelink Mini PC SER5
    CPU
    AMD Ryzen 7 6800U
    Memory
    32 gb
    Graphics card(s)
    integrated
    Sound Card
    integrated
    Monitor(s) Displays
    Benq 27
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Crucial nvme
    Keyboard
    Logitech wired
    Mouse
    Logitech wireless
    Internet Speed
    still too embarrassed to tell
    Browser
    Firefox
    Antivirus
    Defender
  • System 3 is non compliant Dell 9020 i7-4770/24gb ram Win11 PRO 26200.9457
The registry fix doesn't work anymore. It's extremely rare that I need to look at the contents of an image file. I think I can view it if I use the Macrium boot CD. Is that correct? Macrium free works fine, no need to upgrade to the paid Macrium X for me
 

My Computers My Computers

System One System Two

  • At a glance

    WIN 11 PROIntel(R) Core(TM) i5-14400 2.50 Ghz,32 Gigs
    OS
    WIN 11 PRO
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom built - WIN 11 PRO 64-bit ,
    CPU
    Intel(R) Core(TM) i5-14400 2.50 Ghz,
    Motherboard
    ACER Z790 motherboard
    Memory
    32 Gigs
    Hard Drives
    256 gig M2 SSD boot HD, 3 internal HD's, 2 USB

  • At a glance

    Win 10 PROHaswell CPU 4790k @ 4.4GHz,16 Gigs
    Operating System
    Win 10 PRO
    Computer type
    PC/Desktop
    Manufacturer/Model
    CUSTOM
    CPU
    Haswell CPU 4790k @ 4.4GHz,
    Motherboard
    AsRock Z97 motherboard,
    Memory
    16 Gigs
    Hard Drives
    OS drive 250GB SSD,
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