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BSOD Troubleshooting

Incident Analysis // User: Lex Hasher

A problem has been detected and Windows has been shut down to prevent damage to your computer.

DRIVER_IRQL_NOT_LESS_OR_EQUAL

Restart your computer if this is the first time you have encountered this halt error screen. In the event that this screen recurs, proceed with the following procedures:

Ensure that any new hardware or software has been installed correctly. If this is a new installation, consult your hardware or software manufacturer for any necessary Windows updates.

If the issue persists, it is recommended that any recently installed hardware or software be disabled or removed. Disable BIOS memory options, including caching and shadowing. To remove or disable components in Safe Mode, restart your computer, press F8, select Advanced Startup Options, and then select Safe Mode.

Technical information:

*** STOP: 0x000000D1 (0x0000000R, 0x00000007, 0x00000000, 0xG74H2574)

*** strt1.sys - Address G74H2574 base at G74H0000, DateStamp 4eh2534df

POWERSHELL_X64.EXE
ACTIVE_SESSION
Select a command to view its output...
Index Time EntryType Source InstanceID Message
198810:42InformationService Control Manager1073741824The Windows Update service entered the running state.
198710:40InformationDistributedCOM10016The application-specific permission settings do not grant Local Activation...
198610:38WarningTime-Service134The time provider 'VMICTimeProvider' has indicated that the current time is offset...
198510:37InformationApplication Error1001Fault bucket , type 0. Event Name: CLR20r3.
198410:35InformationService Control Manager1073748860The Multimedia Class Scheduler service entered the running state.
198310:35ErrorApplication Error100Application has encountered an internal error and will shutdown (Testing.exe).
198210:29InformationService Control Manager1073748860The TCP/IP NetBIOS Helper service entered the running state.
198110:29InformationService Control Manager1073748860The Multimedia Class Scheduler service entered the running state.
198010:29InformationMsiInstaller1033Windows Installer successfully processed the application upgrade for Lex Hasher.
197910:29WarningDistributedCOM10016The application-specific permission settings do not grant Local Activation...
197810:29InformationMEIx641074200578Intel(R) Management Engine Interface driver has successfullly started.
197710:29InformationMEIx641074200578Intel(R) Management Engine Interface driver has successfullly started.

Post-Incident Analysis: Mission Restoration

Troubleshooting in an enterprise environment requires isolating causality from mere symptoms. This lab tests your ability to correlate user-mode errors with filesystem states under the pressure of high-visibility alerts.

1. Signal vs. Noise: The BSOD "Red Herring"

The DRIVER_IRQL_NOT_LESS_OR_EQUAL BSOD is a kernel-mode failure, but Lex Hasher reports a specific application fault. In Tier 2 support, you must learn: Don't anchor on the scariest screen.

Professional Perspective: Users often misidentify errors as "Blue Screens." By correlating the Visual System Error dialog with the Event Viewer, you filtered out the kernel noise and correctly isolated the user-mode fault.

2. Root Cause: Visual C++ Runtime Dependencies

The missing MSVCP100.dll library belongs to the Microsoft Visual C++ 2010 Redistributable. Applications compiled in C++ require these shared libraries to interface with the OS. If a single .dll is missing, the entire application runtime collapses during initialization.

Real-World Fix: While this lab uses a manual file copy (robocopy) to demonstrate dependency discovery, the permanent enterprise solution is a full Repair/Reinstall of the Redistributable package via SCCM or Intune.

3. Log Triage: Correlation Over Collection

Forensic triage involves matching the Application Error (Index 1983) with the timeline of Lex Hasher’s reported deployment failure.

  • Distractor (Time-Service): A standard NTP sync warning. Benign.
  • Distractor (DistributedCOM): Permission warnings that occur on almost every healthy Windows machine.
  • Index 1983: The "Smoking Gun." Confirms Testing.exe is the crashed process.

4. Command Intent: Verifying Evidence

The CLI is used to confirm what the GUI claims. ls msvc* provides physical proof that while other runtime versions (110) exist, the required 100 module is absent from System32.

  • tasklist | sort: Proves Testing.exe is attempting to start (PID assigned) but lacks the stability to persist.
  • Get-WmiObject: Validated that Lex Hasher's hardware (LEX-HASHER-PC) had sufficient disk space (62GB+) to complete the remediation.

5. The Enterprise Angle: SCCM Incomplete Deployments

Why did this only affect Lex? SCCM deployments often rely on Detection Methods. If a package marks itself as "Successful" even if a prerequisite failed to install locally, you end up with "Incomplete Deployments." Restoration from a Gold Image (USER-PC01) ensures the library hash matches the company baseline.