Unknown error


Nuccii

Nuccii

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Anyone know what is causing this and how to get rid of it, it pops up from time to time and does no appear to affect the system.
Windows installer.webp
 

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This probably happens because the Windows Installer is looking for a cached .msi file (vc_runtimeAdditional_x86.msi) from an older or broken installation package that is no longer on your computer.

If so, some cleaning is needed.
The problem being to identify which package it related to.

You could perhaps search the registry to determine which Visual C++ there's a reference for - here's an example:
1.webp


and then compare the list you find with what actually appears to be installed and see if there's a difference.

Otherwise if it is related to something needed you could:

- Identify (e.g. by elimination) which installed program needs that instance of Visual C
++ and reinstall it

- Uninstall and Reinstall all Microsoft Visual C++ instances (not the best idea if you have a lot of them!)

Suggests something's not been properly uninstalled or been damaged in some way.
 
Last edited:

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have you run a virus check ? malwarebytes still works?
 

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https://i.imgur.com/aoz3vWY.jpg?2
@dalchina I have not yet checked the registry yet but found that some of the Visual C++ instances were in need of repair, I proceeded to perform the repairs.

Will wait a couple of days to see if any affect, will advise.
 

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Windows 11 Home12th Gen Intel(R) Core(TM) i5-1240P 1.70 GHz8GB
OS
Windows 11 Home
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Laptop
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HP ENVY x360 15 Convertible PC 15-es2000
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Sounds a good start.. thanks.
 

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Nuccii said:
@dalchina I have not yet checked the registry yet but found that some of the Visual C++ instances were in need of repair, I proceeded to perform the repairs.

Will wait a couple of days to see if any affect, will advise.
Click to expand...


This will do them all at once...

www.techpowerup.com

Latest Visual C++ Redistributable Runtimes All-in-One Jun 2026 Download

This archive contains the latest version (June 2026) of all VCRedist Visual Studio C++ runtimes, installable with a single click by running the inclu
www.techpowerup.com www.techpowerup.com
 

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    Still assembled, still runs. Haven't turned it on for 15 years?
However, if the error should be related to an unlisted improperly installed version as I suggested, you may need to look deeper.

As you've found some that need repairing, suggest you consider cause and run a disk and file system check.

Crystal Diskinfo (free

AND

chkdsk c: /scan
from an admin command prompt- result on screen.
 

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dalchina said:
This probably happens because the Windows Installer is looking for a cached .msi file (vc_runtimeAdditional_x86.msi) from an older or broken installation package that is no longer on your computer.
Click to expand...
This ^^^^
or C:\ProgramData\Package Cache\ content has been tampered with.
Installing will fail and removal will fail, the .reg option is the best choice.
 

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In case you need to replace or repair:



Open file explorer > type: C:\ProgramData\Package Cache\{GUID}

Instead of {GUID} type: {c18fb403-1e

Open the folder if it exists to see its full name.


Alternatively enter the {GUID} into everything search: voidtools
 

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Also, on the Eleven Forums there was posted an app that checks old unused msi installer instances to see if they are still in use so one could remove others that are strays. I'd have to do some serious checking of my main system to see what app that was.
 

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    Hewlett-Packard Spectre 13-4001 x360 convertable
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