Recently, some users upgraded their system to the official version of win 10, and found that some of their previously installed software was unavailable when they opened applications and functions in the system settings. So, what should we do in this case? Next, Bian Xiao will explain this problem to you. I don't know if you realize that the application software you think is normal shows the disk space occupation of the software in the same location. Unavailable here means that the system cannot detect the accurate disk space occupation of the software. Generally, it is because the installation package registration information of these softwares is incomplete, the installation path information is incomplete, or the software version is too old, or the installation package of these softwares does not support the system to query the disk capacity occupation. When installed on the system, it will be displayed as unavailable here. Therefore, when some software in the application and function of Win 10 system is unavailable, we don't need to panic at all. It's just that the software system can't get its accurate occupied space, which will not cause problems to the software itself.