Windows refuses to open a certain folder

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So I'm having a few problems with a certain folder for windows.

For years I've been using cracked FL studio 12 along with a cracked VST piano to play with a midi interface. Last week, when opening the vst plugin, I got an error saying the version of the vst was too old and that it didn't work anymore. So I had to uninstall the piano and reinstall it, without internet connection or AV (because I assumed the program had patched itself up).

Thing is, the folder where I had all the installation files, which was no bigger than 30 mb, was in a flash drive, and once copied into my hard drive, it wouldn't let me open it, it says that its a 1.37 mb folder, and won't let me check inside or anything. If I open the programs from the hard drive, I can navigate the folder, but once opening the program, I get the message from FL studio that the source does not exists.

Mind you, the AV is off, so I don't know what's causing this.

tl;dr: I can navigate a folder through a flash drive but on opening its contents I get a "source does not exist" message, and if I copy the whole folder into the desktop, windows won't open it at all and will show up the 30 mb folder is now just 1.37 mb

pic unrelated