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Why did some usb ports stop working?

I just went to update my Blackberry & it wouldn't recognize. II checked the device manager & found a yellow exclamation point next to "standard enhanced pci to usb host controller" In device status it said "windows has stopped this device because it has reported problems.(code 43) Both of the usb ports on the front of the pc don't work. The back ones do. I checked to make sure they didn't unplug from the motherboard. I used one port this morning to back up some files. When I first put the Blackberry in it flashed for a second. Any questions just ask. Thanks Ed
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Tony Gimenez
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The blackberry could be drawing too much power.
Also have you tried using the latest version of blackberry manager?

CT
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I tried rebooting as thems kb suggested & now I'm gettin a "info:unexpected i/o error has occured. status: 0x00000e9. It said somehting about usb,hard drive or cd being messed up.
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no it says bootmgr is missing ????
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i meant now it says "bootmgr is missing"
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Thanks Lurk3r & duffman76, For the quick replies & helping me fing a solution.
Ed