A Guide to Keeping Your Windows Computer Healthy

A Guide to Keeping Your Windows Computer Healthy

Even when your computer seems to be running smoothly, there is a lot happening “under the hood.” Over time, small errors can creep into your system files due to power fluctuations, interrupted updates, minor software glitches, or just using your computer every day.

Think of SFC and DISM as a routine wellness check or a little preventative maintenance for your PC. Running them every few months ensures that your Windows foundation remains solid.

Why run these scans as part of your routine maintenance plan?

1. It is much easier to fix a corrupted file error now than to recover a crashed system later.

2. Windows Updates are more likely to install correctly if the underlying system files are healthy.

3. Cleaning up corrupted system data can prevent those “stutters” or brief freezes that we often just ignore.

4. Knowing your core system files match the original Microsoft versions ensures your computer’s security and stability are intact.

You should start with the Deployment Image Servicing and Management tool, commonly known as DISM. While SFC (System File Checker) checks your local files, DISM goes a step further by checking the “Master Copy” of Windows on your hard drive against Microsoft’s official files to make sure they match.

To start, right-click your Start button and select Terminal (Admin) or Command Prompt (Admin). You can also type COMMAND in the taskbar search, press Enter, and choose Run as Administrator.

Type the command

DISM /Online /Cleanup-Image /RestoreHealth 

Exactly as shown, and press Enter.

You will see a progress bar that may seem to “stick” at 20% or 80%, which is normal. Let it finish until it says the operation completed successfully.

Once we know the “Master Copy” is healthy, we can use the System File Checker, or SFC, to scan your active system files and repair any corrupted or missing system files.

In the same window, type sfc /scannow and press Enter. This scan usually takes five to ten minutes to complete.

You’ll likely see one of these scan results:

No integrity violations: This means your PC is in perfect health, and no action is needed.

Successfully repaired files: This is very common and means the tool did its job by finding and fixing minor errors.

Unable to fix files: If you see this, simply restart your computer and try running the DISM command followed by the SFC scan one more time.

Taking a few minutes to run these commands every three months is an excellent habit. It keeps your operating system clean and ensures that those small glitches don’t turn into big trouble down the road.