To tell whether a computer issue is hardware or software, you should first check the symptoms, isolate any recent changes, and then boot into Safe Mode. Computers are complex machines, and while some issues are obvious (like a computer not starting, suggesting power supply or processor issues; or beeping noises, indicating overheating or memory errors; or no display, pointing to graphics processor), often the answer is difficult to pinpoint. The computer repair technicians at Dave's Computers follow these steps: Check the symptoms – Is the computer slow? Will it boot? Does it blue screen? Make funny noises? Not start at all? This first step helps identify the issue. Isolate any recent changes – Have you added hardware, updated drivers, or made other changes? Reversing these changes often resolves the problem. Boot into Safe Mode – If the computer works fine in Safe Mode, it's likely a software issue. If symptoms persist, it could be core Windows files or hardware. From Safe Mode, file checks and repairs can be performed. For hardware issues, components can be swapped with working spares. This is part 1 of a three-part series on computer troubleshooting from Dave’s Computer Repair Blog.