Blog
Real case studies from our day-to-day IT support work — documented, verifiable, no invented solutions.
Error Diagnosis Without a Mouse: How to Troubleshoot Multiple Software Crashes via PowerShell
A practice client, a repeatedly crashing Sidexis 4 — diagnosed entirely via PowerShell instead of the Event Viewer.
Read more →
When Your Server Fails: Emergency Hardware Migration
A total Hyper-V host failure, a day-current backup, and two pitfalls: a ghost host and the wrong VLAN.
Read more →
When a 3D Plugin Refuses to Install: Tracing Error 1603 to Its Root Cause
A 3D plugin fails with error 1603 — system-level tracing reveals a missing, long-deprecated Windows component.
Read more →
One Click in User Management — and Four Nights of Troubleshooting
Why an administrator-reset Windows password irrevocably destroys the DPAPI key chain — and a user profile had to be rebuilt from scratch.
Read more →
Running ISDN on a Stiegeler Fiber Optic Connection
When switching to a Stiegeler fiber optic connection, your legacy ISDN system loses connectivity. A used FRITZ!Box 7590 behind the provider's router solves this — with three caveats.
Read more →
When the Trunk Isn't Broken, It's Cancelled
3CX case study: A cancelled SIP trunk and three routing rules without fallback disabled a customer's Switzerland connectivity for months.
Read more →
The Phone System Only Works Partially
A forensic case study: A 3CX system appeared broken, but the server beneath it had run DDoS malware unnoticed for seventeen days — four theories, one real culprit.
Read more →
The Browser Keeps Serving the Old Version
An updated web tool stays weeks out of date on the user's machine — why heuristic caching causes it, and how a version check reloads without touching stored data.
Read more →