Eric Mack recently posted about a slowdown he is seeing on his Tecra M4 Tablet PC that happens when he is using Windows Explorer. He tracked the problem down to the use of an SD card, either a bad SD card or a problem with the SD reader itself. This jogged my memory to something similar I have seen occasionally pertinent to mobile computers and mapped network drives. Mapping a network drive to a mobile computer is certainly handy when you bring your computer back to your home or office. I do that a lot with directories on another networked computer’s hard drive and I have also done that with optical drives when I didn’t have one handy. That’s a particularly useful way to install software from CD or DVD on Tablet PCs with no optical drive. One thing I experienced was an occasional slowdown in Windows Explorer that was related to mapped network drives not being available when Windows was looking for it. Windows XP seems to have a too-long timeout process during which the mobile computer is basically useless. To combat this problem when I use mapped drives now I make sure when I map the drive to not check the option to reconnect the drive automatically on startup. It dimishes the usefulness of mapped drives a little but now I don’t have the annoying timeout slowdown on my Tablet PC because I am only mapping drives that I know are available.