If you’re browsing in Windows Explorer and particular folders load just so much slower than the others, check if those folder contains zip files.
This is because Windows Explorer takes effort to “help” read those zip files so that you can access them as if they’re another sub-folder. If you’re accessing that folder often, you might want to shift those zips somewhere else to prevent Windows from trying to read them.
For those keen on removing this “feature” permanantly, run:
regsvr32 /u %systemroot%\system32\zipfldr.dll