Test this on one of the folders giving you a problem.
First go to Folder Options > View and check "show hidden files"; then for the test period, UNcheck "hide protected system files".
Also check for this test, "do not cache thumbnails"
Now go to one of these folders and look for a "thumbs.db" file and either delete it or rename it thumbs.bak
If you are using a 3rd party image program that has a thumbnail cache you will need to disable its thumbnail caching.
For example if you have Photoshop:
1. right-click on file
2. properties
3. photoshop image tab
4. uncheck generate thumbnails