THEMEPACK File Extension

What is THEMEPACK file?

THEMEPACK is a system file associated with Microsoft Windows 7. THEMEPACK files store desktop themes in CAB archive format. THEMEPACK can be used to export or import custom Windows 7 (and later) desktop themes. Desktop themes can also be saved as THEME files, which have so limitations regarding external resources and files. Windows 8 and later used DESKTHEMEPACK format, which is not backward compatible.

Windows desktop themes

Desktop themes are used for customizing desktop user interface. Themes allow users to customize sounds, background images, or window color settings. User can use multiple themes and switch between them easily. Themes can defined the following interface elements:

• Background image,
• Interface settings,
• System icons,
• Mouse pointer icon,
• System sounds,
• Screensaver.

All themes settings and additional files are saved in THEMEPACK files.

Programs which support THEMEPACK file extension

The following listing features THEMEPACK-compatible programs. Files with THEMEPACK suffix can be copied to any mobile device or system platform, but it may not be possible to open them properly on target system.

Updated: 07/29/2022

How to open file with THEMEPACK extension?

Being unable to open files with THEMEPACK extension can be have various origins. What is important, all common issues related to files with THEMEPACK extension can be resolved by the users themselves. The process is quick and doesn’t involve an IT expert. The following is a list of guidelines that will help you identify and solve file-related problems.

Step 1. Install Microsoft Windows Personalization Control Panel software

The main and most frequent cause precluding users form opening THEMEPACK files is that no program that can handle THEMEPACK files is installed on user’s system. This issue can be addressed by downloading and installing Microsoft Windows Personalization Control Panel or different compatible program, such as Microsoft Windows 8, Microsoft Windows 7. On the top of the page a list that contains all programs grouped based on operating systems supported can be found. The safest method of downloading Microsoft Windows Personalization Control Panel installed is by going to developer’s website () and downloading the software using provided links.

Step 2. Check the version of Microsoft Windows Personalization Control Panel and update if needed

If the problems with opening THEMEPACK files still occur even after installing Microsoft Windows Personalization Control Panel, it is possible that you have an outdated version of the software. Check the developer’s website whether a newer version of Microsoft Windows Personalization Control Panel is available. It may also happen that software creators by updating their applications add compatibility with other, newer file formats. The reason that Microsoft Windows Personalization Control Panel cannot handle files with THEMEPACK may be that the software is outdated. The latest version of Microsoft Windows Personalization Control Panel should support all file formats that where compatible with older versions of the software.

Step 3. Associate Windows 7 Theme Pack files with Microsoft Windows Personalization Control Panel

If you have the latest version of Microsoft Windows Personalization Control Panel installed and the problem persists, select it as the default program to be used to manage THEMEPACK on your device. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

Selecting the first-choice application in Windows

• Right-click the THEMEPACK file and choose Open with option
• Next, select the Choose another app option and then using More apps open the list of available applications
• The last step is to select Look for another app on this PC option supply the directory path to the folder where Microsoft Windows Personalization Control Panel is installed. Now all that is left is to confirm your choice by selecting Always use this app to open THEMEPACK files and clicking OK.

Selecting the first-choice application in Mac OS

• From the drop-down menu, accessed by clicking the file with THEMEPACK extension, select Information
• Open the Open with section by clicking its name
• From the list choose the appropriate program and confirm by clicking Change for all....
• If you followed the previous steps a message should appear: This change will be applied to all files with THEMEPACK extension. Next, click the Continue button to finalize the process.

Step 4. Verify that the THEMEPACK is not faulty

If you followed the instructions form the previous steps yet the issue is still not solved, you should verify the THEMEPACK file in question. Being unable to access the file can be related to various issues.

1. Check the THEMEPACK file for viruses or malware

If the THEMEPACK is indeed infected, it is possible that the malware is blocking it from opening. Scan the THEMEPACK file as well as your computer for malware or viruses. THEMEPACK file is infected with malware? Follow the steps suggested by your antivirus software.

2. Verify that the THEMEPACK file’s structure is intact

If you obtained the problematic THEMEPACK file from a third party, ask them to supply you with another copy. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. If the THEMEPACK file has been downloaded from the internet only partially, try to redownload it.

3. Ensure that you have appropriate access rights

Sometimes in order to access files user need to have administrative privileges. Switch to an account that has required privileges and try opening the Windows 7 Theme Pack file again.

4. Make sure that the system has sufficient resources to run Microsoft Windows Personalization Control Panel

If the systems has insufficient resources to open THEMEPACK files, try closing all currently running applications and try again.

5. Ensure that you have the latest drivers and system updates and patches installed

Latest versions of programs and drivers may help you solve problems with Windows 7 Theme Pack files and ensure security of your device and operating system. Outdated drivers or software may have caused the inability to use a peripheral device needed to handle THEMEPACK files.

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