Install error 1603 with latest VirtualBox


Haven't got round to testing fully yet, but have looked at the manual installation method described by 'fth0' and all it describes is how to apply the necessary certificate files from the latest Test Build Guest Additions ISO prior to installation, so I can't see that it would pose any additional 'security risk'.

I haven't found what was meant by using "the appropriate option" in the VirtualBox installer, so still puzzling over what Klaus meant by that in his post. Most of my VirtualBox use (almost 10 years) has been for running Windows/Linux on macOS Hosts, so it feels a bit like breaking new ground with the Windows Host process!
I'll stick to using 6.1.36 for now, at least I know that works
 

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Probably a sound decision. If it ain't broke, no reason to fix it.

I was just going to try it in a VM, using nested virtualisation, to check if the outlined installation process works.
 

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Probably a sound decision. If it ain't broke, no reason to fix it.

I was just going to try it in a VM, using nested virtualisation, to check if the outlined installation process works.
Yes I don't want to get involved in manually installing certificates
 

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
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