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0x8A15000F Data Required by the Source Is Missing in winget

This post first appeared on the ET Ducky blog. I build ET Ducky, an RMM that reads ETW on Windows and eBPF on Linux. 0x8A15000F is the winget return code APPINSTALLER_CLI_ERROR_SOURCE_DATA_MISSING, wi

etducky.hashnode.dev

Peter Mamrukov4d ago · 5 min read

My PC started lagging once AI agents moved in. Two causes, both fixable by hand

At some point my home PC started to lag. Not crash, just hesitate: a window takes a second to open, the cursor freezes for a beat. That machine runs AI coding agents almost around the clock, Claude Co

netbka.hashnode.dev

Peter MamrukovOct 24 · 5 min read

A read-only first week: three questions to ask your computers

Originally published at localcmd.app/use-cases/read-only-first-week. Most people's first worry about letting an AI near their computers is the same: what if it deletes something. So don't start there.

netbka.hashnode.dev

Christopher SmithOct 24 · 4 min read

Event ID 20 WindowsUpdateClient Installation Failure and How to Find the Cause

This post first appeared on the ET Ducky blog. I build ET Ducky, an RMM that reads ETW on Windows and eBPF on Linux. Event ID 20 from Microsoft-Windows-WindowsUpdateClient is the event Windows writes

etducky.hashnode.dev

Onlive ServerOct 23 · 6 min read

Running Nested Virtualization Labs on Windows Hyper-V Server 2025: Setup and Performance Audit

Running multiple virtual machines usually requires substantial hardware resources. However, Windows Server 2025 supports nested virtualization through Hyper-V, allowing administrators to create virtua

onliveinfotech.hashnode.dev

AdminPackStudioOct 19 · 47 min read

WinRM Cannot Complete the Operation: A Read-First Name, Port, Listener, Firewall Profile, and TrustedHosts Triage

Helpdesk: "From JUMP01, Enter-PSSession -ComputerName FS02 fails with 'Connecting to remote server FS02 failed with the following error message : WinRM cannot complete the operation. Verify that the s

adminpackstudio.hashnode.dev

AdminPackStudioOct 19 · 49 min read

Failover Cluster Event ID 1135 (Node Removed from Active Membership): A Read-First Heartbeat, Network, and Threshold Triage

Helpdesk: "Overnight, during the backup window, HV02 dropped out of the Hyper-V cluster for about a minute. The System log on HV01 and HV03 has Event 1135: 'Cluster node 'HV02' was removed from the ac

adminpackstudio.hashnode.dev

AdminPackStudioOct 19 · 44 min read

Cluster Network Name Resource Failed Registration (Event 1196, 1257): A Read-First DNS, CNO, and Record Triage

Helpdesk: "Since the storage maintenance on Saturday, the file server role on the Hyper-V cluster won't stay online on HVN02, and the System log there keeps showing Event 1196: 'Cluster network name r

adminpackstudio.hashnode.dev

AdminPackStudioOct 19 · 42 min read

FSMO Role Transfer Failed: A Read-First Owner, Replication, Permission, and Seize-or-Wait Triage

Helpdesk: "DC01 died Saturday night (the vendor says the replacement board won't arrive before Thursday). Since then nobody can create new user accounts on one of the remaining DCs, and a password res

adminpackstudio.hashnode.dev

AdminPackStudioOct 18 · 44 min read

Certificate Autoenrollment Not Working: A Read-First GPO, Template Permission, CA, and DCOM Triage

Helpdesk: "The new 802.1X Wi-Fi needs a computer certificate on every laptop. About half of the Finance laptops got one this week; the rest show nothing in the Personal store. The PKI admin duplicated

adminpackstudio.hashnode.dev

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0x8A15000F Data Required by the Source Is Missing in winget

My PC started lagging once AI agents moved in. Two causes, both fixable by hand

A read-only first week: three questions to ask your computers

Event ID 20 WindowsUpdateClient Installation Failure and How to Find the Cause

Running Nested Virtualization Labs on Windows Hyper-V Server 2025: Setup and Performance Audit

WinRM Cannot Complete the Operation: A Read-First Name, Port, Listener, Firewall Profile, and TrustedHosts Triage

Failover Cluster Event ID 1135 (Node Removed from Active Membership): A Read-First Heartbeat, Network, and Threshold Triage

Cluster Network Name Resource Failed Registration (Event 1196, 1257): A Read-First DNS, CNO, and Record Triage

FSMO Role Transfer Failed: A Read-First Owner, Replication, Permission, and Seize-or-Wait Triage

Certificate Autoenrollment Not Working: A Read-First GPO, Template Permission, CA, and DCOM Triage