When moving files within the Cornell fileshare, Windows warns that it is not from a trusted source. To remove this warning and trust everything on the cornell.edu network, follow these steps:

1. Start Menu > type Internet Options
2. Select Security > Local intranet zone 
3. Click Sites > Advanced
4. Enter "\\cornell.edu"
5. Make sure 'Require server verification...' is unticked

Source: https://superuser.com/questions/44503/how-do-i-tell-windows-7-to-trust-a-particular-network-location