Encountering Windows system errors can be frustrating, especially when you’re unsure of what they mean or how to fix them. One such error is ERROR_135, which might display a message like:
“ERROR_135: The data is not valid.”
This guide will walk you through the causes of this error and how to resolve it efficiently — no tech jargon, just simple steps you can follow.
What is ERROR_135?
Before jumping into solutions, it’s helpful to understand what this error means. In Windows, ERROR_135 typically indicates that an operation or process received invalid or corrupted data. This can happen during file operations, program installations, system services, or when managing system settings.
Common Causes of ERROR_135
- Corrupted system files or registry entries
- Faulty or incomplete software installation
- Issues with Windows system updates
- Problems with disk or file system integrity
- Conflicts with antivirus or third-party software
Step-By-Step Solutions to Fix ERROR_135
Step 1: Restart Your PC
You might be surprised how often a simple restart clears temporary glitches causing the error. Before diving into technical fixes, reboot your computer and check if the issue persists.
Step 2: Run System File Checker (SFC)
Corrupted system files are a frequent culprit behind ERROR_135. Windows includes a handy tool called System File Checker to scan and repair these files.
- Click the Start Menu, type cmd.
- Right-click Command Prompt and select Run as administrator.
-
In the black command window, type:
sfc /scannow
- Press Enter.
- Wait patiently as Windows scans and fixes corrupted files.
- Once complete, restart your PC and check if the error persists.
Step 3: Run DISM Tool
If SFC didn’t fix the issue, the Deployment Image Service and Management Tool (DISM) provides a deeper repair.
- Open Command Prompt as administrator again.
-
Type and run these commands one at a time:
DISM /Online /Cleanup-Image /CheckHealth
DISM /Online /Cleanup-Image /ScanHealth
DISM /Online /Cleanup-Image /RestoreHealth - Each may take a while; make sure not to interrupt the process.
- Restart your computer afterward.
Step 4: Check Disk for Errors (CHKDSK)
Disk errors can cause invalid data problems. Use the Check Disk utility:
- Open Command Prompt as administrator.
-
Type:
chkdsk /f /r
- You may be prompted to schedule this for the next restart. Type Y and press Enter.
- Restart your PC, and Windows will scan your disk for issues.
Step 5: Verify and Repair Problematic Software
If ERROR_135 shows up during software installation or launch:
- Uninstall the problematic application via Control Panel > Programs and Features.
- Download the latest version from the official website.
- Install the program again, preferably running the installer as an administrator.
- Disable antivirus software temporarily during installation, just in case it is blocking necessary operations.
Step 6: Update Windows
Running the latest Windows updates ensures you have essential bug fixes and compatibility improvements.
- Go to Settings > Update & Security > Windows Update.
- Click Check for updates.
- Install any available updates, then restart your PC.
Step 7: Clean Boot Your PC
Sometimes, third-party apps can cause conflicts resulting in ERROR_135.
- Press Win + R, type msconfig, and press Enter.
- Under the Services tab, check Hide all Microsoft services, then click Disable all.
- Go to the Startup tab and open Task Manager.
- Disable all startup items.
- Restart your PC and test if the error persists.
- If fixed, re-enable services one-by-one to identify the culprit.
Step 8: Restore Your System
If none of the above works, reverting your PC to a point before the error started can help.
- Search for Recovery in the Start menu.
- Open Recovery > Open System Restore.
- Choose a restore point from before the error appeared.
- Follow the on-screen instructions to complete.
Final Thoughts
Windows ERROR_135, while annoying, is usually fixable with a bit of patience and methodical troubleshooting. By following these steps carefully, you’ll either resolve the issue or gain insight into deeper problems that may require professional assistance.
If you’ve tried everything and the error persists, consider reaching out to Microsoft Support or a trusted computer technician for help.
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Did this guide help you fix your Windows Error Code 135? Let us know in the comments below! And remember, always back up your important data before making major system changes.
Happy troubleshooting!
