Troubleshoot worker.js Errors and Download File

Sometimes Windows system displays error messages regarding corrupted or missing worker.js files. Situations like that can occur, for example, during a software installation process. Each software program requires certain resources, libraries, and source data to work properly. Corrupted or nonexistent worker.js file can therefore effect in failed execution of the started process.

worker.js file JavaScript. The file was developed by Microsoft for use with Windows software. Here you will find detailed information about the file and instructions how to proceed in the event of worker.js related errors on your device. You can also download worker.js file compatible with Windows 8.1, Windows 8.1, Windows 8.1, Windows 8.1, Windows 8.1 devices which will (most probably) allow you to solve the problem.

Compatible with: Windows 8.1, Windows 8.1, Windows 8.1, Windows 8.1, Windows 8.1

User popularity

3.1 Scanning for malicious software
3.2 System and driver update
3.3 System File Checker tool
3.4 System recovery

4 Download worker.js

4.1 List of worker.js file versions

File info

General information
Filename	worker.js
File extension	JS
Type	Script
Description	JavaScript

Software
Program	Windows 8.1
Software	Windows
Author	Microsoft
Software version	8.1

Details
File size	2414
Oldest file	2014-11-21
Latest file	2014-11-21

Most common worker.js file related problems

There are various types of errors related to worker.js file. worker.js file may be located in wrong file directory on your device, may not be present in the system, or may be infected with malicious software and therefore not work correctly. Below is a list of most common error messages related to worker.js file. If you encounter one listed below (or similar), please consider the following suggestions.

worker.js is corrupted
worker.js cannot be located
Runtime Error - worker.js
worker.js file error
worker.js file cannot be loaded. Module was not found
cannot register worker.js file:
worker.js file could not be loaded
worker.js file doesn't exist

worker.js

Application could not be started because worker.js file is missing. Reinstall the application to solve the problem.

Problems related to worker.js can be addressed in various ways. Some methods are meant only for advanced users. If you don't have confidence in your skills, we suggest consulting a specialist. Fixing worker.js file errors should be approached with utmost caution for any mistakes can result in unstable or unproperly working system. If you have the necassary skills, please proceed.

How to fix worker.js errors in just few steps?

Remember, before taking any action related to system files perform a backup copy of your data!

worker.js file errors can be caused by various factors, so its is beneficial to try to fix them using various methods.

Step 1: Scan your computer for any malicious software

Windows files are commonly attacked by malicious software that prevents them from working properly. First step in addressing problems with worker.js file or any other Windows system files should be scanning the system for malicious software using an antivirus tool.

If by any chance you don't have any antivirus software installed on your system yet, you should do it immediately. Unprotected system is not only a source of file errors, but, more importantly, makes your system vulnerable to many dangers. If you don't know which antivirus tool to choose, consult this Wikipedia article – comparison of antivirus software.

Step 2: Update your system and drivers.

Installing relevant Microsoft Windows patches and updates may solve your problems related to worker.js file. Use dedicated Windows tool to perform the update.

Go to the Windows "Start" menu
Type "Windows Update" in the search field
Choose the appropriate software program (name may vary depending on your system version)
Check if your system is up to date. If any unapplied updates are listed, install them immediately.
After the update has been done,restart your computer in order to complete the process.

Beside updating the system, it is recommended that you install latest device drivers, as drivers can influence proper working of worker.js or other system files. In order to do so, go to your computer or device producer's website where you will find information regarding latest driver updates.

Step 3: Use System File Checker (SFC) tool

System File Checker is a Microsoft Windows tool. As the name suggests, the tool is used for identyfing and addressing system file related errors, including those related to worker.js file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the worker.js file with properly working version. To use the tool:

Go to the Windows "Start" menu
Type "cmd" in the search field
Locate "Command Prompt" result – don't run it yet:
Click the right mouse button and select "Run as Administrator" option
Type "sfc /scannow" in console prompt to start the program and follow the instructions

Step 4: Restoring Windows system

Another approach is to restore system to previous state, before the worker.js file error occured. In order to restore your system, follow the instructions below

Go to the Windows "Start" menu
Type "System Restore" in the search field
Start the system restore tool – it's name may differ depending on version of the system
The application will guide you through the process – read the messages carefully
After the process has finished, restart your computer.

If all the above-mentioned methods failed and the worker.js file problem has not been resolved, proceed to the next step. Remember that the following steps are intended only for advanced users.

Download and replace worker.js file

The last solution is to manually download and replace worker.js file in appropriate folder on the disk. Select file version compatible with your operating system and click the "Download" button. Next, go to your web browser's "Downloaded" folder and copy the downloaded worker.js file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of worker.js file example directory paths.

Windows 8.1: C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.5.9600.20605_x86__8wekyb3d8bbwe\moderncalendar\views\freebusy\
Windows 8.1: C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.5.9600.20605_x86__8wekyb3d8bbwe\moderncalendar\views\freebusy\
Windows 8.1: C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.5.9600.20605_x86__8wekyb3d8bbwe\moderncalendar\views\freebusy\
Windows 8.1: C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.5.9600.20605_x86__8wekyb3d8bbwe\moderncalendar\views\freebusy\
Windows 8.1: C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.5.9600.20605_x86__8wekyb3d8bbwe\moderncalendar\views\freebusy\

If the steps did not solve your worker.js file problem, you should consult a professional. A probability exists that the error(s) might be device-related and therefore should be resolved at the hardware level. A fresh operating system installation might be necessary – a faulty system installation process can result in data loss.

File versions list

Filename worker.js

System Windows 8.1

File size 14521 bytes

Date -0001-11-30

Download

File details
	MD5	1c2da83206dbef1a0ed1d8131d6c40ff
	SHA1	4d6c72ab62f3ed97516fc49e70f8a7e249ad7c64
	SHA256	590cf146ec70331fe4a109d990893b9ee9b219c838578e88491d847dad0d174e
	CRC32	40363d61
	Example file location	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.5.9600.20605_x86__8wekyb3d8bbwe\moderncalendar\views\freebusy\

Filename worker.js

System Windows 8.1

File size 8418 bytes

Date 2014-11-21

Download

File details
	MD5	489fdb9d2784e6e7613020843c1ff5e4
	SHA1	a44178757d1f482acd66a592478f978c73107f81
	SHA256	84351f027258e7d769a3854bf720e42f254ccaf8064d04b90483fa18145495b6
	CRC32	b845d932
	Example file location	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.5.9600.20605_x86__8wekyb3d8bbwe\moderncalendar\views\freebusy\

Filename worker.js

System Windows 8.1

File size 9901 bytes

Date -0001-11-30

Download

File details
	MD5	918b3f90634768ccb14e4abceb1bac68
	SHA1	4746709c21d6c57753236c790425cc8fbc706c63
	SHA256	878644ceb958c0ac2fe8b5bd320dd96fed563056037aaffa9e72083ad0d57d64
	CRC32	c55729f1
	Example file location	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.5.9600.20605_x86__8wekyb3d8bbwe\moderncalendar\views\freebusy\

Filename worker.js

System Windows 8.1

File size 2414 bytes

Date -0001-11-30

Download

File details
	MD5	dc0b4e4eabe56518016b70707c6e3671
	SHA1	b008c49cf82f49feea87f8c62ada309b59012e82
	SHA256	6075ecade3044bff1c8d052f2696adbc363f8918e57abef205659185ec842c75
	CRC32	a3763d54
	Example file location	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.5.9600.20605_x86__8wekyb3d8bbwe\moderncalendar\views\freebusy\

Filename worker.js

System Windows 8.1

File size 8780 bytes

Date -0001-11-30

Download

File details
	MD5	f716ecf2cb4509e91bfa117be5a1be83
	SHA1	a99ebaa379e579a353024f5d49ea1a5fe3d230ef
	SHA256	f76939c93a9adf86c227306883da3b57ec5e92af9844e3efb542d9538011d9da
	CRC32	64f5945e
	Example file location	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.5.9600.20605_x86__8wekyb3d8bbwe\moderncalendar\views\freebusy\