We here at Winaero love Windows customization and we post several custom 3rd party visual styles and themepacks from time to time. We have a HUGE and amazing collection of themes for changing the look-n-feel of Windows. But Windows doesn't allow 3rd party themes by default, so we need to unlock Windows to be able to use those themes.
Note: If you are not a Windows 8.1 user, please refer to the following article.
With every new Windows release, Microsoft makes some minor changes to the theme engine and/or its format. This leads to the situation where for every single release, you need a special software (a so called UXTheme patcher) which supports that new release. Windows 8.1 is no exception.
To use third party themes in Windows 8.1, you should follow these simple steps.