If your file does not open correctly after downloading: breaks in data transmission during file transfers are common when network traffic is high. A break and subsequent restart may cause an error at the restart point, which results in a corrupt transfer. The end result is a file that does not open or run correctly. For example, *.exe files may not run, *.pdfs may not open, and *.zip files may be reported as invalid archives. The simplest solution is to retry downloading the file. If the problem persists, try to download the file when network traffic is lighter.