arduino - Leonardo: Gets detected in Device Manager but then gets disconnected -

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an arduino leonardo gets detected in device manager, gets disconnected.

so, doing. connecting arduino leonardo laptop. gets detected in device manager (i have updated driver well). however, hear beep , leonardo gets uninstalled. if push 'reset' button gets detected again. however, after few seconds gets disconnected again. device manager displays message

currently, hardware device not connected computer. (code 45)

note: working fine couple of weeks ago. using windows 7.

looks problem whit soft-reset of leonardo, normaly whe connect leonardo, appears on device manager ard...bootloader(comx), few seconds , leonardo appears in different com port. know, in case after dessappear. try select port in arduino ide, have try load sketch blink.ino, , press reset button @ same time, when sketch beginning uploaded release de reset, tha works me,


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