About DiagCore
DiagCore is an independent knowledge base dedicated to PC hardware diagnostics. We focus on one thing: helping people understand what is actually happening inside their computers when something goes wrong.
The guides on this site are written for users who want clear, practical information — not marketing copy for tools they do not need. We cover hard drive health analysis, memory testing, CPU thermal management, POST error decoding, and SMART data interpretation.
Our content is particularly relevant for Windows 11 users, where hardware compatibility issues and new error patterns have introduced diagnostic challenges that older guides do not address.
All tools and resources we reference are free. We do not sell anything, and we do not accept sponsored content. External links go only to authoritative sources: manufacturer documentation, academic research, and established open-source projects.
Accuracy First
Every guide is reviewed against current hardware specifications and updated when manufacturers change their recommendations or when new tools become available.
No Unnecessary Complexity
Diagnostic information does not need to be buried in jargon. We explain technical concepts in plain language without oversimplifying the details that actually matter.
Free Tools Only
All software referenced in our guides is freely available. We do not recommend paid tools when free alternatives provide equivalent diagnostic capability.