My device version V02.01.09A - SanDisk Sansa m250 MP3 Player

Device drivers are often updated to add functionality or increase performance. Usually, installing the newest driver is a good thing, but sometimes there is a bug in the driver software, or the new driver is incompatible with your system, and you'll want to go back to the previous version. Windows saves a copy of the old driver, so you can easily "roll back" to the version that you know works.

To roll back a driver in Windows Vista, follow these steps:

A. Click the Vista orb to open the Start menu.

B. In the Search bar, type "device" and then click Device Manager in the list of results.

C. Click Continue when the User Account Control window pops up.

D. In the Device Manager, click on the plus sign (+) next to the appropriate category, and double click on the device that needs its driver rolled back.

E. Go to the Driver tab, and click the Roll Back Driver button.

F. Follow the system prompts.

If the Roll Back Driver button is grayed out, that means there is no previous version of the driver to roll back to. You can visit the device manufacturer's web page and try to find an older version of the driver there.

It's important to note that rolling back a driver installs whichever version of the driver you had loaded on your system, not the second most recent version. So if you had version 1.0 installed for your wireless keyboard, then you updated to version 3.4, rolling back your driver would reinstall version 1.0, no matter how many versions had been released between the two.

samsung rest code Service codes Samsung:
E900 software version: *#5002*8376263#
E900 full reset: *2767*3855#
Service codes Spice:
S404 enable COM port: *#42253646633# -> Device -> Set UART -> PS -> UART1/115200
S410 engineer mode: *#3646633#
S900 software version: *#8375#
S900 serial no: *#33778#
Service codes Philips:
S200 enable COM port: *#3338913# -> Device -> Set UART -> PS -> UART1/115200
Service codes "Chinese" models:
default user code: 1122, 3344, 1234, 5678
Engineer mode: *#110*01#
Factory mode: *#987#
Enable COM port: *#110*01# -> Device -> Set UART -> PS Config -> UART1/115200
Restore factory settings: *#987*99#
LCD contrast: *#369#
software version: *#800#
software version: *#900#
Service codes BenQ:
software version: *#300#
test mode: *#302*20040615#
Service codes Pantech:
software version: *01763*79837#
service menu: *01763*476#
reset defaults (phone/user code reset to default): *01763*737381#
Service codes VK-Mobile 3xx, 5xx:
software version: *#79#
software version: *#837#
service menu: *#85*364# (hold #)
Service codes VK200, VK2000, VK2010, VK2020, VK4000:
software version: *#79#
service menu: *#9998*8336# (hold #)
reset defaults (phone/user code reset to default): *#9998*7328# (hold #)