What's up with thumb drives?

Over the past 3 days I have bought 3 thumb drives-- A Kinston and 2 SanDisks (all USB 2.0), and none of them work in known good ports, both 2.0 and 3.0. Just can't believe 3 out of 3 would be bad.




Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz, Intel64 Family 6 Model 42 Stepping 7
Processor Count: 8
RAM: 8174 Mb
Graphics Card: NVIDIA GeForce GTX 660, -2048 Mb
Hard Drives: C: Total - 71680 MB, Free - 10654 MB; F: Total - 34997 MB, Free - 28289 MB; G: Total - 20991 MB, Free - 20597 MB; H: Total - 30719 MB, Free - 30012 MB; I: Total - 12197 MB, Free - 7632 MB; J: Total - 320484 MB, Free - 283520 MB; K: Total - 35839 MB, Free - 34437 MB; L: Total - 394910 MB, Free - 391243 MB; N: Total - 94295 MB, Free - 77165 MB;
Motherboard: Intel Corporation, DP67BG
Antivirus: AVG AntiVirus Free Edition 2013, Updated and Enabled