Hardware & Drivers

Intel High Definition DSP Driver: How to Fix the Device Manager Error on Windows 11/10

Seeing Intel High Definition DSP with a yellow warning in Device Manager? Here’s what it is and how to install the right…
Windows Errors

The Diagnostics Policy Service Is Not Running: How to Fix It on Windows 11/10

Seeing “The Diagnostics Policy Service is not running” in Windows Network Diagnostics? Here’s how to start the service, stop it switching off…
Windows Errors

WMI Provider Host (WmiPrvSE.exe): Is It a Virus and How to Fix High CPU

WMI Provider Host (WmiPrvSE.exe) is a genuine Windows process. Here’s how to check it isn’t a virus, find the app making it…
Windows Errors

Windows Hello PIN “This Option Is Currently Unavailable”: How to Fix It

Windows Hello PIN, fingerprint or face says “This option is currently unavailable”? Turn off the Hello-only sign-in setting, check work policies and…
Windows Errors

BAD_POOL_CALLER on Windows 11/10: What It Means and How to Fix It

BAD_POOL_CALLER (0xC2) blue screen on Windows 11 or 10? Find the faulty driver, remove recent software, update or roll back drivers, test…
Windows Errors

How to Turn Off Efficiency Mode in Windows 11 (Task Manager, Edge and Power Settings)

How to turn off efficiency mode in Windows 11: uncheck it in Task Manager, turn it off in Edge or Chrome, and…

How every guide is built

01 / THE EXACT PROBLEM

We start from the error message or symptom you actually see, and explain what causes it in plain words.

02 / SAFEST FIX FIRST

Quick, low-risk steps come first. Anything that changes system settings comes later, with a warning.

03 / WHERE IT APPLIES

Each guide says which Windows or app versions it covers, so you don’t follow steps meant for a different system.

04 / KEPT CURRENT

When Windows or Office changes, guides are reviewed and the update date is shown at the top.