Hello. i have a wierd problem: when i connect my arc via USB to my netbook everything is good and i can explore it, copy, delete..... when i connect it to my desktop (win7 X64) it says the the drive structure is corrupted and unreadable. a few weeks ago it worked fine, i hav'nt done anything drastic since than, i tried to do "last known good", didnt work, restore point, didnt work. i uninstalled the "SEMC HSUSB device" driver, reboot and pluged the phone back, it recognizes the phone, assigns it a letter and gives me the same message. i tried everything i know, and im certified on windows 7. can anyone please help???