At one point I wanted to see if I could build my code in Visual Studio. (it could already be done in pocc / gcc), so after I made a new project in that folder, I realized it had put in a .vc directory that was 100MB... I still have no idea what that is for. After all, Pelles C can do all of the things I would use it for without that. Maybe the reason it takes so long to load is that it has to load files from this directory? I didn't care enough to investigate further, I just deleted all of the files related to that after seeing such a waste. Maybe if I really want to build it with cl.exe I can write a batch file for that.