Interactive Diagnostic Platform

Find Fast Solutions to Technical Issues

Select an interactive troubleshooter below to step through root-cause diagnostics and resolve issues quickly.

All Current Guides Hardware & Drivers (71) Networking & Connectivity (56) Operating Systems & Performance (68) Security, Malware & Access (22) Software, Applications & Web Services (74)
Software, Applications & Web Services

Fix 100% Disk Usage & High CPU Spikes on Windows

Seeing **100% Disk Usage** or massive CPU spikes in Task Manager? When system utilization hits the ceiling, your entire PC slows to a crawl, apps freeze, and fans run at full speed. This interactive decision tree will help you pinpoint whether SysMain, corrupt page files, or Windows Search indexing is pinning your hardware.

Interactive Tree Launch Guide →
Software, Applications & Web Services

Fix: Screen Flickering & Graphics Driver Crashes

An unstable display—whether it manifests as constant **screen flickering**, brief black screens, or "Display driver stopped responding" popups—can make your PC completely unusable. Let's determine if this is a refresh rate mismatch, a background app conflict, or corrupted GPU drivers (NVIDIA, AMD, or Intel).

Interactive Tree Launch Guide →
Software, Applications & Web Services

Fix: "Default Gateway Is Not Available" Network Error

Getting kicked off the internet every few minutes, only for Windows troubleshooter to fix it temporarily with **"The default gateway is not available"**? This loop happens when your network adapter loses communication with your router. Use this guide to disable power-saving drops, set a static gateway, and reset your network socket permanently.

Interactive Tree Launch Guide →
Software, Applications & Web Services

Fix: "DNS Server Not Responding" Error

Your internet is connected, but your browser refuses to load any pages, throwing a **"DNS Server Not Responding"** or **DNS_PROBE_FINISHED_NXDOMAIN** error. This means your PC can't translate website names (like google.com) into IP addresses. Let's pinpoint where the breakdown is happening and get you back online.

Interactive Tree Launch Guide →
Stay Updated

Get Technical Diagnostic Guides In Your Inbox

Subscribe to StepDiag for the latest interactive troubleshooting flowcharts, IT triage tips, and infrastructure diagnostics. No spam, unsubscribe anytime.