While Downloading
After the download
the quotestuff and site link
a quick google search lead me to http://productforums.google.com/foru...me/b62vcAkLVp8
try the fixes there and report back :O
Hey, there's nothing to worry about the attachment in itself. That attachment suffix means it's a currently running chrome download. I assume you're running google chrome, because that suffix is used by them to store the partial files you download, while they are downloading.
I'll attach a quote and a link to a website with some more explanation info. Ignore the software push at the bottom, the site just explains a bit about the suffix
the quotestuff and site link
In short: There's nothing nefarious at first appearances, that's a perfectly normal running download. The only thing to worry about, is if they remain a .crdownload after you finish the download process. I'm not too sure on the 0kb finished download size, though.