How do I check for errors in Windows 7?

Having a stable and error-free Windows 7 operating system is important for the performance and reliability of your computer. However, errors can sometimes occur after installing updates, new software, or hardware. Fortunately, Windows 7 has some built-in tools to help you identify and troubleshoot errors.

Check the Event Viewer

The Event Viewer is a useful tool included in Windows 7 that logs various system events and errors. You can use it to see if any critical errors have been logged that could be causing issues. Here are the steps to open the Event Viewer:

  1. Go to the Start menu and type in “event viewer”. Select “Event Viewer” from the search results.
  2. This will open the Event Viewer program. In the left pane, click on “Windows Logs” and then select “System” to see critical system errors.
  3. Look for any error events listed with a red “Error” icon. The details of the error will be displayed when you click on an event.

Pay attention to any errors that have occurred around the time you first noticed a problem. Critical errors related to system files, drivers or hardware may indicate an underlying issue.

Check the Reliability Monitor

The Reliability Monitor is another handy tool in Windows 7 that tracks system stability and errors over time. Here’s how to access it:

  1. Go to the Start Menu, type in “reliability”, and select “View Reliability History”.
  2. This will display the Reliability Monitor graph and detailed log of system errors.
  3. Look for any red dots on the graph indicating errors. Expand an error to see details like the error type and what program was affected.

The Reliability Monitor can help you identify patterns with recurring errors and hardware/software faults over time.

Check Disk for Errors

Using Check Disk is a good way to scan your hard drive volumes for errors and bad sectors. Here is how to run it:

  1. Go to My Computer and right-click on the hard drive volume you want to scan and select Properties.
  2. In the Properties window, go to the Tools tab and click “Check Now” under Error checking.
  3. Make sure both options are checked: “Automatically fix file system errors” and “Scan for and attempt recovery of bad sectors”.
  4. Click Start to begin scanning the volume. This may take some time.

Check Disk will attempt to repair any file system errors or bad sectors it finds. This can help resolve a number of disk-related errors.

Verify System Files with SFC

The System File Checker (SFC) utility can scan Windows system files and replace any missing or corrupt files. Here’s how to run it:

  1. Open the Start Menu, type “command prompt” and run it as Administrator.
  2. In the Command Prompt, type the following command and press Enter:
    sfc /scannow
  3. This will start scanning your system files immediately. Let it complete.
  4. If any errors are found, SFC will attempt to replace them from a cache.

Running SFC regularly can fix system file errors that may be causing crashes or instability.

Update or Roll Back Faulty Drivers

Problematic drivers can sometimes cause errors after being updated or installed. If errors started after a driver update, try updating it again or rolling back the driver:

  1. Open Device Manager by right-clicking Computer and selecting Manage.
  2. Expand the device category and double-click the problematic driver.
  3. Go to the Driver tab and try clicking “Update driver” or “Roll back driver.”
  4. Follow the prompts to update or roll back the driver software.

This may resolve driver conflict errors if a recent update caused problems.

Check for Overheating Issues

Overheating can lead to computer errors or crashes. Check for overheating issues using these steps:

  1. Open the Start Menu and type in “performance”, then select “View performance information.”
  2. Go to the “Monitoring Tools” tab and double-click “Heat Monitor” to launch it.
  3. Let the computer run for a bit and check if any components are overheating above 90°C / 194°F.
  4. Also check inside the computer case and make sure fans are running and unobstructed.
  5. Clean out any dust buildup from heat sinks, fans and vents if needed.

Dealing with overheating can resolve thermal throttling and sudden crashes related to heat. Also try updating BIOS, chipset and graphics drivers.

Check Memory for Errors

Errors in your system memory (RAM) can cause unpredictable crashes or boot issues. You can scan for memory errors using Windows Memory Diagnostic:

  1. Open the Start Menu, type “memory” and select “Windows Memory Diagnostic”.
  2. Select “Restart now and check for problems” to scan the memory on reboot.
  3. The tool will run on reboot – let it complete one full pass which may take several minutes.
  4. When done, it will show if any errors were found. Errors may indicate faulty memory modules.

If persistent memory errors are found, try reseating or replacing RAM modules as needed to resolve them.

Check System Logs for Startup Issues

If your computer is having issues booting properly or crashing during startup, system logs may provide clues. Follow these steps:

  1. Access the Event Viewer and expand Windows Logs > System as covered previously.
  2. Look for any critical errors logged right around the timestamps for system boots and crashes.
  3. Also review the Application log around the same timestamps for clues.
  4. Google any specific error codes found to research possible solutions.

Startup and boot crashes will typically log error events you can look up to troubleshoot the cause.

Scan for Malware and Viruses

Malware and viruses can sometimes cause system instability, crashes and errors. Scan your system using these steps:

  1. Open the Start Menu and search for “Windows Defender Security Center”.
  2. Click “Virus & threat protection” and then “Scan options”.
  3. Click “Full scan” and then “Scan now” to scan the whole system.
  4. Remove any detected malware/viruses. Consider additional scans with Malwarebytes.

Removing malware and viruses can resolve crashes, sluggish performance, browser redirects and other issues.

Update Windows and Software

Outdated Windows software and drivers can cause compatibility issues leading to errors. Make sure your system is updated:

  1. Open Windows Update by searching for “check for updates”.
  2. Install any important updates for your version of Windows.
  3. Also update graphics drivers, motherboard drivers and other software.
  4. Restart your PC after installing updates.

Updating Windows components and 3rd party software will help resolve bugs and incompatibility issues.


Following these troubleshooting steps can help you identify and resolve many different errors in Windows 7 that may be causing crashes, instability issues, poor performance and other problems. Checking logs like the Event Viewer and Reliability Monitor can provide clues to the source of errors. Running utilities like Check Disk, SFC and Memory Diagnostic can scan for and repair system file errors, disk errors, faulty memory and other issues.

Updating drivers, monitoring temperatures, scanning for malware/viruses and installing the latest Windows and software updates are also important steps to keep your system stable and error-free. With some diligent troubleshooting using these built-in Windows tools, you can resolve many common Windows 7 errors and get your system running smoothly again.

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