To my understanding the scan on windows is regards to possible share folders. It's not nessesary to let it scan. Go to LW's menu Tools-Options & Saving & check the dwnld folder. It might be worth reselecting this folder & pressing apply. There might be something not so correct about the installation. So go thru your preferences (Tools-Options-... various options & select what suits U & your computer.
The only other option I can think of is that you've dwnlded a corrupt file. Which can happen, there's plenty out there unfortunately.
U would need to reinstall again to bring up the scan window but it's not necessary.
Check out these threads to help you optimize your LW:
http://www.gnutellaforums.com/showth...5&pagenumber=1 http://www.gnutellaforums.com/showth...threadid=27036
probs
http://www.gnutellaforums.com/showth...threadid=27285