Windows problem cant find C:\WINDOWS\INF\wpdmtp.inf.

SOURCE: a service section installation INF is invalid.

Just to be clear, no special drives are necessary. MSC mode will work out of the box with just about any OS. MTP mode will work as long as you have WMP 10 or 11 installedFirstly, lets explain MSC mode and MTP mode a bit.

MSC stands for Mass Storage Class. When your player is in this mode, the computer will see it the same way it would see a flash drive, as a removable disk. It will assign it the first available drive letter, as well as one for the memory card (if applicable). This is probably the more popular of the 2 modes, and is a more "open source" type of standard. Most comptuers detect the player in this mode without a problem.

MTP stands for Media Transfer Protocol. It is a Microsoft standard and is Microsofts solution to connecting digital players and cameras to a window based platform. MTP mode must be used in order to transfer ANY Digital Rights Managment (DRM) protected content. Services like Rhapsody and Napster will only function in this MTP mode.

SanDisk has provided both of these modes at the users options on MOST of the entire Sansa Line mp3 players. The c200, and The View, do not have these 2 options in every version of firmware. Instead those players use an "Auto Detect" function that is suppose to Automaticly use MTP mode. If MTP mode does not work for any reason, it should default to MSC mode.




Switching between MSC and MTP modes

• Turn the Sansa on, if it is not already
• Navigate to the main menu of the player; this is the same menu that gives us options such as Play, Record, Info, etc...
• Navigate to "Settings" on the main menu of the player.
• After navigating to "Settings", we should see an option that states "USB" or "USB MODE"
• From here we can select MSC or MTP modes (could vary based on player model)
• Highlight the desired mode and select it, at this point it will roll back to the 'Settings' menu
• Connect the player to the computer and verify it is connecting in the desired mode.
  

It should be noted, when a device is in MSC mode, it will appear as a "Removable disk". When connected in MTP mode, it will show up as an "Audio Device"
You can also try to reinstall Windows Media Player 10 or 11. Next W*ndows has a update to fix if all else fails try this. http://www.microsoft.com/downloads/details.aspx?FamilyId=A2E73160-E862-4F19-BB26-C0CAFE798955&displaylang=en