I am currently using WooCommerce 1.5.6 on WordPress 3.3.1 but also tried upgrading to WooCommerce 2.0.9 on WordPress 3.5.1 and experienced the same issue. My issue is this. I have a large zip file available for purchase. The sale all goes as expected and the user receives a link. Mac users have no problem downloading the file via Safari or Firefox (have not yet tested Google Chrome). However, Windows users have no problem starting the download, but after about 5-10%, it hangs and never continues or finishes. Like I said, I tried this both with my current configuration and also with a fully upgraded configuration with identical results. Has anyone else run into this issue and know of a potential fix? Any help or suggestions are greatly appreciated. By the way, this is being hosted on a GoDaddy shared hosting plan, in case hosting was a question.