Para mim, o problema era o gerenciador de acesso a dispositivos da HP. A remoção do programa resolveu o problema.
Link onde eu encontrou a solução.
Texto relevante:
just bought a new HP ProBook 450 G1... running Windows 7...I inserted a USB flash drive to copy some some files from my other compute, and got the Windows Messgae "You don't currently have access to open this folder", then I press the "continue" button, and get the message "You have been denied permission to access this folder", and it says "To gain access to this folder you will need to use the security tab". I click on the "security tab" link, but there is not any "security tab" in the properties menu for the flash drive. My logon is the administrator and has all accesses checked'. I also tried other flash drives and a USB harddrive, and access was denied on all of them. Not sure if this is a Windows 7 issue or an issue with the pre-loaded HP software, which I will probably unistall, but waiting to see if you have an easy fix for this ?
It was the pre-installed "HP Device Manager" causing the denied access. For some reason, at first, the proper ballon messages were not being disaplayed, but later after some restarts, I noticed the message. So I uninstalled it, and I now have access to the external drives... sure don't need that hassle of entering my password everytime I attach a flash driver or external hard drive (and it only giving me access for 15 minutes). Maybe there's was a way to change the parameters within the HP Device Manager... but ain't nobody got time for that ! Smiley Happy