.Net Runtime Error in Event Viewer

Hello all

Does anyone know why I am receiving this Error:

Log Name: Application
Source: .NET Runtime
Date: 17/08/2025 10:20:15
Event ID: 1022
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: KNC-HTPC
Description:
.NET Runtime version 4.0.30319.0 - There was a failure initializing profiling API attach infrastructure. This process will not allow a profiler to attach. HRESULT: 0x80004005. Process ID (decimal): 14420. Message ID: [0x2509].
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name=".NET Runtime" />
<EventID Qualifiers="0">1022</EventID>
<Version>0</Version>
<Level>2</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2025-08-17T09:20:15.6411082Z" />
<EventRecordID>634</EventRecordID>
<Correlation />
<Execution ProcessID="14420" ThreadID="0" />
<Channel>Application</Channel>
<Computer>KNC-HTPC</Computer>
<Security />
</System>
<EventData>
<Data>.NET Runtime version 4.0.30319.0 - There was a failure initializing profiling API attach infrastructure. This process will not allow a profiler to attach. HRESULT: 0x80004005. Process ID (decimal): 14420. Message ID: [0x2509].</Data>
</EventData>
</Event>

The Process ID (decimal): 14420 refers to SearchFilterHost.exe.

Thanks in advance

Kevin

Try disabling the service "Windows Search"

Hello @abactuon

Thanks for the Reply.

Will Disabling 'Windows Search' not have any detrimental effects for Windows 11?

Thanks in advance

Kevin

Disabling Search will not allow you to search your computer. I don't think that is the answer.
Try the .NET Framework Repair Tool.

Don't waste your time trying to fix the error; it is purely cosmetic. It is caused by SearchFilterHost.exe running in sandboxed/protected mode. The error takes place when Windows Search loads an ifilter to index the contents of a document. The process completes successfully, but triggers this erroneous error. If you don't have an ifilter installed, you will never see this. Only Microsoft can fix the this new non-error.

I'm having the same problem here too.

There's already another thread open for this :

As Drminer said, we have to wait patiently for Microsoft to release a patch to fix this issue.

Many users are encountering this error.

Spunk said:

Disabling Search will not allow you to search your computer.

Click to expand...

That is not true as I have search service disabled but can still search for files in file explorer if I want to.
Search service just makes it faster as files are indexed.
I have other apps I use for search so no need for search service.