Looked for but was not able to find USB lowerfilter or upperfilter entries in registry editor (HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\), there are lowerfilter and upperfilter entries in other areas, including class diskdrives, the lowerfilter Uninstalled ALL devices under Universal Serial Bus controllers and rebooted. Tried updating drivers: I get "Windows has determined the driver software for your device is up to date." I've tried everything I can find on the Internet, including the following: Such as mice, keyboards, and Bluetooth adapters work fine. Device status for each of these says: "This device cannot start. Running Windows 7 on the new cloned 850 I can't use any type of USB storage, including different brands of UFDs, or my iPod Nano. Then I cloned the Windows 7 C drive using the Samsung Data Migration tool from an 840 Pro Series 2.5-Inch 256 GB SATA 6GB/s Solid State Drive MZ-7PD256BW to an 850 EVO 500GB 2.5-Inch SATA III Internal SSD Windows 7, UFDs and iPod Nano were working fine. Serious guru points if you can solve this one!
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