How to Fix WEB.DAT Error? Is it safe?

Frustrated by the WEB.DAT error message? Well, you should want to know what this WEB.DAT file is, what causes this error and the most important thing is how to fix this error. In this page, you will find all answers to your questions about this WEB.DAT and the methods to fix it.

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What's WEB.DAT File?

As its file extension denotes, WEB.DAT is a vital dat file and it's a component of the software unknow developed by Windows Software Developer. The latest version of WEB.DAT file is and MD5 value is f3b1f1a1a16671292607a8888ec329c6. This error can be seen on Windows XP, Windows Vista, Windows 7, Windows 8 and Windows 10.

WEB.DAT file information:
File Name:   
   WEB.DAT (Free Scan)
Product Version:
   Windows Software Developer
File md5:   
File type:   
   dat file
Security Level(0-5):   
OS Infected:   
   Download WEB.DAT Error Free Scan Tool

Why Do I Receive WEB.DAT Error?

unknow and the Windows will generate WEB.DAT error when WEB.DAT file cannot be used due to the removal or corruption of WEB.DAT file. Virus infection is also a potential cause of WEB.DAT error.

Popular WEB.DAT Error Messages

  • The application has failed to start because WEB.DAT was not found. Re-installing the application may fix this problem.
  • The program can't start because WEB.DAT is missing from your computer. Try reinstalling the program to fix this problem.
  • WEB.DAT failed. The specified module could not be found.
  • File not found: WEB.DAT.
  • Failed to load library 'WEB.DAT'.
  • Access violation in module 'WEB.DAT'.
  • Component 'WEB.DAT' or one of its dependencies not correctly registered a file is missing or invalid.

You may receive WEB.DAT error when you run or close unknow, start or shut down the computer, or use specific function of unknow. The time you encounter the error is very important to troubleshoot the problem.

Causes of WEB.DAT Error

WEB.DAT error can be caused by plenty of reasons. The following are the most common causes of WEB.DAT error.

  • The latest version of WEB.DAT file is overwritten by a previous version installed by another newly-installed program.
  • There is a malfunctioning or faulty hardware in your computer.
  • WEB.DAT file is infected with malicious adware, Trojans, spyware and malware.
  • The associated entries of WEB.DAT are corrupted in the registry.
  • WEB.DAT file that is still used by other programs is uninstalled by another program.

How to Fix WEB.DAT Error?

If you're confident of fixing this problem yourself, we have listed several solutions to troubleshoot your WEB.DAT problem.

Method 1: Do a System Restore.

System Restore is another useful utility integrated in Windows to help users revert their system files, installed applications, Windows registry and settings to that of a previous point of time. It's often used to fix problems like WEB.DAT error caused by unexpected change made by a new program installation or abnormal Windows behaviors.

Note: Please do a full backup before performing System Store, otherwise, you may risk losing your files and data.


a. Go to the desktop of your system, right click on Computer and click Properties.

computer properties

b. In the left pane, click System protection.

system protection

c. In the System Properties window, click System Restore.

system restore

d. In the System Restore window, click Next.

system restore next

e. From the list of restore points, select one you wish to restore from. Click Next.

select restore point

f. If you do not want to change your decision, then click Finish.

confirm system restore

g. Click Yes.

yes restore

Method 2: Run a virus scan.

Malware infection is one of the most popular cause of various computer problems like WEB.DAT error. Computer malware can make their way into the system, change system settings and corrupt system files. When this happens, unknow and Windows becomes more prone to WEB.DAT error and even malfunction.


a. Restart your system into Safe Mode with Networking.

b. Open your antivirus or antispyware program. (You can also use this recommended malware detect tool)

c. Run a full scan for your system.

d. After the scan completes, either quarantine or remove any detected malware.

e. Restart your system.

Method 3: Install Windows updates.

Computers and computer software can quickly become out-dated, so Microsoft keeps releasing updates in order to improve their security and fix technical glitches. Your WEB.DAT error may be fixed after you install all latest Windows updates.


a. Go to the desktop of your system, right click on Computer and click Properties.

computer properties

b. In the left pane, click Windows Update.

windows update

c. In the Windows Update window, click Check for updates.

check for updates windows 7

d. If any update is found, click Install updates to install.

install updates windows 7

Method 4: Update device drivers.

Many issues, conflicts and vulnerabilities of device drivers may result in unexpected problems like WEB.DAT error. Drivers are software that enables Windows system to talk and give instructions to hardware devices. Though drivers work correctly one day, they may have problems the next day. Keeping your drivers updated is a way to keep your system error-free.

Method 5: Repair corrupted Windows registry.

As the most important part of Windows operating system, Windows registry is a place that stores all information and configurations of software and hardware. A problematic registry is one of the most common causes of computer errors like WEB.DAT error. Software installation, uninstallation, malware infection can make changes to the registry. Over time, more and more invalid entries are left and accumulated in the registry and then lead to various errors and problems. The registry needs regular maintenance to keep it tidy and stable. Manual editing the registry is not practical for people with no computer expertise, it's recommended that you use a registry cleaner to do this job.


Note: It requires certain computer knowledge to perform the above solutions. If you're not comfortable with this process, it's recommended that you download and run this automatic error fix utility to fix your PC problems automatically:

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Does WEB.DAT error still persist?

Feel free to contact us for more assistance.

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