USB power management in device manager, allow to turn off or not ?

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)2 Duo CPU E7400 @ 2.80GHz, Intel64 Family 6 Model 23 Stepping 10
Processor Count: 2
RAM: 8191 Mb
Graphics Card: NVIDIA GeForce 9600 GT, 1024 Mb
Hard Drives: C: Total - 76801 MB, Free - 25886 MB; D: Total - 66560 MB, Free - 16757 MB; E: Total - 30721 MB, Free - 14229 MB; H: Total - 20479 MB, Free - 20388 MB; I: Total - 32548 MB, Free - 32456 MB; J: Total - 22527 MB, Free - 22435 MB; K: Total - 218880 MB, Free - 218782 MB;
Motherboard: ASUSTeK Computer INC., P5QL PRO
Antivirus: Norton Internet Security, Updated and Enabled
- So my question is should I not enable the "allow windows to turn off this device to save power" option box in the device manager under power management for my USB hub and front desktop ports, and the back USB root hub ports too ? This store built desktop computer has 2 built in USB on top of the case, and a added in 4 port USB hub in a front bay. This setting was set to allow, but when it went off and I then connected a USB flash drive into one, it would not come back on to detect that USB drive, so I then unchecked the allow option boxes on all USB hubs listed in the Windows 7 device manager.