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Software Installation & Configuration Issues

Subject: Fundamental Of Computer Troubleshooting (VU-CYB 203)
INTRODUCTION
Modern software does not work alone. Most applications depend on other software components, libraries, and configuration settings. When any of these are missing or incorrect, the software may fail to install, crash, or behave unexpectedly.

Software problems usually occur during installation, startup, or runtime. Understanding the type of problem helps in fixing it quickly.

1. Application Crashes


An application crash occurs when a program suddenly stops working or closes unexpectedly.

Common Causes
1. Missing libraries or dependencies
2. Incompatible operating system
3. Programming errors (bugs)
4. Insufficient memory or storage
5. Corrupted installation files

Example
A Python application closes immediately with an error message like:

ModuleNotFoundError: No module named 'kivy'

Explanation: The program depends on a library (kivy) that is not installed on the system.

Basic Troubleshooting Steps
1. Read the error message carefully
2. Identify the missing file or library
3. Install the missing dependency
4. Restart the application

2. Version Compatibility Issues


Version compatibility problems occur when software components are not designed to work together because they are different versions. Effect if this includes; Installation failure, Unexpected errors and Application crashes.

Why This Happens
1. New versions remove old features
2. Some libraries require specific versions of other libraries
3. Operating systems may not support older software

Example:
- A Python project works on Python 3.9 but fails on Python 3.12
- An Android app fails on older Android versions

Best Practices / Solution
1. Always check software requirements
2. Use recommended versions

3. Missing Libraries


A missing library is a required external software component that is not installed on the system.
ImportError: No module named 'flask'


Why It Happens
- Library was never installed
- Installation failed
- Virtual environment not activated

Solution
pip install flask

Most modern applications depend on multiple libraries, not just one.


Cache and Temporary Files


Cache and temporary files are stored data used to speed up applications.

Problems They Can Cause
- Loading outdated information
- Preventing updates from applying
- Causing installation or runtime errors

Examples
1. Browser showing old website content
2. Application refusing to update
3. Installer failing repeatedly

Solution
1. Clear cache OR for a hard refresh (Ctrl+F5)
2. Delete temporary files
3. Restart the system or application


By: Vision University

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