Knowledge base for software setup, errors, and daily tool work.

How to Unlock APT in Ubuntu: Fix Locked Package Manager

If you see an error like 'Could not get lock /var/lib/dpkg/lock' or 'Unable to acquire the dpkg f...

Fix Windows Defender Real-Time Protection Turning Off

If you see a notification that Windows Defender real-time protection is off, or it keeps turning ...

How to Fix DNS Server Not Responding During Windows Update

When you run Windows Update and see a 'DNS server not responding' error, it usually means your PC...

Docker Container Restarting Due to Health Check: Causes and Fixes

How to Fix Jupyter Notebook Token Authentication Error

When you start Jupyter Notebook, you might see a prompt asking for a token or password, or the br...

How to Fix SQLite Database Is Locked Error

You try to write to an SQLite database and get SQLITE_BUSY or database is lock...