The opposite of installed can be described in several ways, depending on the context. One of the most common antonyms for installed is 'uninstalled,' which means that the particular device or software has been completely removed from the system or device. Moreover, 'taken out' can be another antonym of installed, which refers to the physical removal of an object from a place, such as taking a machine out of a factory floor. Similarly, dismantled can also be used as an antonym of installed, which suggests the process of taking apart or disassembling something that has been previously installed. Furthermore, some other antonyms for installed could be 'unfitted,' 'extracted,' or 'dislodged.