Very good. Perhaps switch your zip file program to winRAR. I can't say for sure, but it might fix the problem with extracting the files.
I had that program on my computer before and it worked really good but after a while they started charging me for its useage and thats why I tried 7zip instead because I simply needed a program to extract files from zip files and didnt need alot of fancy features or anything like that. If I get some money maybe ill use winRAR and see if theres a difference or not.