My laptop, an HP Pavilion dv7-1120em (Intel Centrino 2), originally running Vista Home and upgraded to Windows7 Home Premium (32 bits) in December, stopped showing my USB jump drives about a month and a half after the upgrade. In the beginning, I had only one jump drive and, when it became "invisible", I bought another which functioned normally for about a week before becoming invisible too. The second jump drive is, however, seen in the Drive Manager (I hope this is the correct term; I'm using a French system) and I can explore its contents with the Drive Manager even though I can't copy to or from the jump drive (the copying fails). Furthermore, the two jump drives work perfectly on a Windows7 (64 bits) machine, another one under XP as well as on my own laptop when I boot to a Ubuntu CD. Does anyone know of a solution? Thank you in advance.