You do not always need a third-party “PC cleaner” to get useful information about a Windows computer. Microsoft includes tools that can check memory, system files, storage health, reliability, and malware protection.
These checks can point you in the right direction, but no single test proves that every component is healthy. Back up important files before troubleshooting a computer that freezes, crashes, overheats, clicks, or unexpectedly shuts down.
Check Windows Security first
Open Windows Security from the Start menu. Review Virus & threat protection, Device security, and the protection-status indicators. Install current security intelligence, then run a Quick scan. Use a Full scan when suspicious behavior continues or when you want Windows to inspect more files.
If pop-ups or redirects are the main problem, read Why Does My Browser Keep Redirecting Me?.
Use Windows Memory Diagnostic
Faulty memory can cause random restarts, blue screens, corrupted files, freezing, and application crashes. Save your work, search for Windows Memory Diagnostic, and choose the option to restart and check for problems.
The test runs before Windows fully loads. Do not interrupt it. After Windows restarts, results may appear in a notification. If they do not, Event Viewer can contain the MemoryDiagnostics-Results entry. A reported error deserves attention, but a clean result does not rule out every intermittent memory problem.
Review drive health
Open Settings > System > Storage, then review storage usage and available space. Very low free space can slow updates and normal operation.
For a basic file-system check, open Terminal or Command Prompt as an administrator and run `chkdsk /scan`. This online scan checks the Windows volume without immediately scheduling repairs. If Windows reports errors, back up important data before approving repairs or running more intensive tests.
Clicking noises, disappearing files, repeated drive errors, or a drive that vanishes from Windows can indicate a more serious hardware problem. Avoid repeatedly scanning a failing drive because heavy activity may make data recovery harder. Review the data recovery service if important files are at risk.
Check Windows system files
Open Terminal or Command Prompt as an administrator and run `sfc /scannow`. System File Checker examines protected Windows files and attempts to replace damaged copies.
If SFC cannot repair everything, Microsoft’s Deployment Image Servicing and Management tool may help. A common command is `DISM /Online /Cleanup-Image /RestoreHealth`, followed by another `sfc /scannow` after DISM completes. Keep the computer connected to power and do not close the window while these tools are working.
Look at Reliability Monitor
Search Windows for View reliability history. Reliability Monitor shows a timeline of application failures, Windows failures, warnings, updates, and installations. Repeated failures that started after one driver or program change can be an important clue.
One isolated warning is not necessarily a serious problem. Look for patterns that match the dates and times when the computer misbehaved.
Run Windows Update carefully
Open Settings > Windows Update, check for updates, and install normal security and quality updates. Restart when requested. Optional driver updates should be approached carefully; do not install every optional driver simply because it is listed. When the computer currently works well, the manufacturer’s tested driver may be the safer choice.
Know when to stop testing
Stop and seek help if the computer overheats, smells unusual, makes clicking or grinding sounds, repeatedly loses the drive, will not stay powered on, or contains irreplaceable files that are not backed up. Diagnostic software cannot repair a swollen battery, failing drive, damaged charging circuit, or other physical fault.
For plain-language help interpreting results, contact Clemtech Computers or call Matt at 256-497-5578. Clemtech provides local computer diagnostics and repair help in Athens and nearby North Alabama communities.
