Listen divya,
if you are using tera copy on your system to copy your files to usb or vice versa.....the solution is you have to remove(uninstall) tera copy and then everything would get back to normal.........so just give it a try.......
you can reffer to this link also.....
http://www.fixya.com/support/t1419603-file_integrity_violated
http://support.microsoft.com/kb/58299
Vishant Sharma
August 2011
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