Java JDK Not Recognized After Installation: Fixes and Checks
You installed the Java Development Kit (JDK), but when you type java -version or
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix 'Port Already Allocated' Error in Windows Defender
You open Windows Defender Security Center or try to run a scan, and you see an error saying a por...
Fix Windows Update Error 0x80070002: Step-by-Step Repair Guide
Windows Update error 0x80070002 usually means the installer cannot find a required file. This oft...
Windows Update Stuck at Checking for Updates: How to Fix
You click 'Check for updates' in Windows, and the progress bar just sits there—sometimes for hour...
Fix MySQL Connection Refused on Localhost
You try to connect to MySQL on localhost and get ERROR 2003 (HY000): Can't connect to MySQL...
Fix PostgreSQL Password Authentication Failed on Localhost
You try to connect to PostgreSQL on localhost with a password, but get FATAL: password auth...
Topic paths
Quick titles
Enable Windows Security Auto Start: ChecklistFix Windows Activation Gateway Timeout on a Domain NetworkWindows Defender 0x80240022 Update Error GuideHow to Resolve Git SSH Permission Denied on MacFix Windows Update Error 0x80244022: Step-by-Step GuideHow to Resolve DNS Error in Windows SecurityFix Windows Defender Real-Time Protection Grayed OutTroubleshooting WinSCP Permission Denied (Publickey)