It can depend on a no. of things. If you're dwnlding the same type of file & it comes directly/indirectly from the same source, then it's probably corrupted at its source. The chances of there being so many corrupted files during transit are so remote (unless u/the source have a poor & unreliable connection.) I'm sure u won't find all types of dwnlds or even all of that type of dwnld will be corrupted. In the extreme, if u find your corrupted dwnlds are all coming from the same ip address, then go to your LW Tools/Options & Filters & add that address to filter them out. Also add .exe to your keyword filter. Beware of movie files that are small in size or have a very long name!!!