Typically, in order to adjust the appearance of Windows, users need to edit, or "patch," DLL files. These files contain the various graphical resources and settings that control the system's appearance. Because these are critical system files, editing them frequently is not recommended. This could result in the files accidentally being corrupted. As a result, a backup copy of the files should always be kept, just in case something goes wrong.

UxStyle Core is a simplified version of the UxStyle program, the function of which is to eliminate the need for manual resource patching. It does so by handling themes in a modular fashion. Each theme that is downloaded from the Internet comes in a ZIP file that can be easily imported into UxStyle. Once imported, it can be activated or deactivated at will. This allows the user to easily switch themes without modifying any system files. However, it is still highly advisable to back up the files that UxStyle changes just in case there is a mishap. This is a fairly likely occurrence, since anyone can create a theme, whether they are experienced with the inner workings of Windows or not.

A "turn off" to UxStyle Core is that its main web site gives nearly zero information regarding what the program actually does. Instead, the user is given a choice between the Windows 7 SP1 and older version or the experimental Windows 8 version. In the interests of safety, a user should not download a program until they are very clear on what it does and if its developer is reputable. The UxStyle website provides only a sentence fragment to explain this, making the program's function rather hard to guess at.

UxStyle Core supports most versions of Microsoft Windows and has preliminary support for the new Windows 8 operating system.