Laptop unable to use BitLocker on drive with VSS service shell tampering

4.5

The command shell used by VSS for internal tasks has been tampered with.

Symptoms
  • BitLocker error
  • CMD/PowerShell alert
  • Service crash
Possible Causes
  • Malware
  • System file corruption

Step-by-Step Fix

1

Run SFC /Scannow

Repair cmd.exe and powershell.exe.

2

Check for Shell Hijacking

Ensure the "COMSPEC" variable is correct.

3

Scan for Malware

Look for shell-resident viruses.

When to See a Technician

VSS sometimes calls external shells for cleanup; if the shell is hijacked, the service fails.

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