Why is my Windows user directory littered with .inf and .sys files?

Question

I've noticed quite an accumulation of files in my base users directory on Windows Vista (C:\Users\username). I really hate having files littered across my hard drive unnecessarily.

Some of them seem to be related to Motorola--I have a Motorola RAZR V3m that I connect to my computer via USB. Here's a sampling of the file names:

• 1236237042-oem13.inf
• MCCI_BUS.INF
• MCCI_MDM.INF
• MCCI_SDM.INF
• mqdmbus.sys
• mqdmcmnt.sys
• USB_CMCS_2000.INF
• USB_MOT_A1000.INF
• USB_MOT_BRIT.INF
• USBMOT2000.INF
• usbsermpt.sys

How did these files get here and are they safe to delete?

Answer 1

These files are for the Motorola phone:

• mqdmbus.sys
• mqdmcmnt.sys
• USB_CMCS_2000.INF
• USB_MOT_A1000.INF
• USB_MOT_BRIT.INF
• USBMOT2000.INF
• usbsermpt.sys

And these seem to be from Sealthbot:

• 1236237042-oem13.inf
• MCCI_BUS.INF
• MCCI_MDM.INF
• MCCI_SDM.INF

Whether or not you still use these programs will determine if you should delete them.

Answer 2

It has to do with how Vista installs things. If you have a lot of USB devices, you will have a lot of those files.