I re-created a few USBs with 2.0 with Antivirus uninstalled, same issue. The computer in question is an older tower, Pentium 4, 512 MB ram, 200 GB hard drive, Windows XP SP2. There doesn't appear to be any special hardware installed in the system. This is not a big issue by any means, just happened to notice it. Tested the 2.0 on a Windows 10 unit, and it works just fine.