system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:  Why does it take 30 minutes to install some programs but not even 30 seconds to uninstall it?  

Thanks!
gpt
When a computer writes something to a disk, like when you're installing something, it has to do two things. First, it has to write the data to the disk. This takes up most of the time. Then it has to make a record in a special part of the disk called an index that says "the data you're looking for is over here" so that the disk can remember to find it again later and so that it isn't overwritten by accident when more data is written.

When removing something from the disk, like when uninstalling, the computer just needs to remove the record from the index. That will make the disk "forget" that the data is there. This takes a lot less time than actually writing the data.