We recently received two HP Compaq 8510p notebooks. They came with WIndows VIsta Business. Out of the box they come configured so that the main hard drive is C:, the HP_Recovery partition is D:, the OS_tools partition is E: and the DVD-ROM is F:. This is a problem on our company network because login mapping assigns part of the network to the F: drive of everyone's computer, and thatg can't be changed.
To fix this conflict I went to Disk Management and changed the assigned drive letters for the extra partitions and for the DVD-ROM. I the also loaded the latest updates from Windows Update and from HP. After all that, for some reason, on one of the computers now no longer shows the HP-Recovery or the OS_Tools partitions. In DIsk Managment the space that used to be assigned to those two partitions is now shown as on 9.3 GB unsassigned partition. I am not sure what happened to cause that space to be unassigned, but the real question is do I really need those two partitions? The computer seems to be working OK without them. The other computer, by the way, still shows the two partitions with their re-assigned drive letters.