Software⏱️ 3 min read📅 2026-06-11

How to Fix: Microsoft JScript compilation error

A Microsoft JScript compilation error is occurring on a Windows 7 Ultimate x64 SP1 machine with Java 6U29 installed.

Quick Answer: The issue may be related to an incompatibility between the Java version and the system, and can be resolved by updating or reinstalling Java.

The Microsoft JScript compilation error is a frustrating issue that may appear on Windows 7 Ultimate x64 SP1 with all latest updates, and Java 6U29. This error occurs when the jusched.exe, javaws.exe, or javaw.exe processes are running in the background, causing a dialog box to pop up intermittently. The error is not unique to the user and can be triggered by various system activities.

In this troubleshooting guide, we will walk you through the steps to identify and resolve the Microsoft JScript compilation error. We will explore possible root causes and provide two primary fix methods to resolve this issue.

💡 Why You Are Getting This Error

  • The Microsoft JScript compilation error is often caused by a misconfigured Java Runtime Environment (JRE) on your system. Specifically, the javaws.exe and javaw.exe processes may be running with incorrect command-line properties, leading to the error. This can occur due to various reasons such as outdated or corrupted JRE files, incorrect configuration settings, or interference from other system processes.
  • Another possible root cause of the Microsoft JScript compilation error is a conflict between Java 6U29 and Windows 7 Ultimate x64 SP1. The error may be triggered by the use of certain system features or software components that interact with Java 6U29, causing it to malfunction.

🛠️ Step-by-Step Verified Fixes

Resolving the Error using System Configuration

  1. Step 1: Step 1: Open the Windows System Configuration utility. Press the Windows key + R, type 'msconfig', and press Enter. In the System Configuration window, navigate to the Startup tab.
  2. Step 2: Step 2: Disable any suspicious startup programs that may be interfering with Java 6U29. Look for javaw.exe or jusched.exe in the list of startup programs and disable them if necessary.
  3. Step 3: Step 3: Restart your system to apply the changes.

Resolving the Error using Java Configuration

  1. Step 1: Step 1: Open the Command Prompt as an administrator. Press the Windows key + X, select Command Prompt (Admin), and press Enter.
  2. Step 2: Step 2: Navigate to the directory where the javaw.exe file is located. Type 'cd C:\Program Files (x86)\Java\jre6' and press Enter.
  3. Step 3: Step 3: Run the following command to update the Java configuration: 'javaws -version'. This will check for any updates or patches available for Java 6U29.

🎯 Final Words

To summarize, the Microsoft JScript compilation error can be resolved by disabling suspicious startup programs and updating the Java configuration. By following these steps, you should be able to resolve this issue and prevent it from occurring in the future.

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