I just installed complete MiKTeX 64 bit. I noticed the setup files lie in my AppData/Local/Temp folder and it's taking up about 1 GB. Does it contain any important files for MiKTeX to run or can I safely delete it?
For ease of distribution, TeX can be downloaded in its entirety as an archived bundle. This archive is stored in a temporary location before being extracted to a location of your choice on your local drive. Once installation is complete, you can safely remove this temporary download.