Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: USB stick problem - error 31

26 May 2011   #1

Windows 7 Home Premium 32bit SP1
USB stick problem - error 31

Hi all,
I have problem with my Huawei K3715 dongle. It won't let me connect to the internet, I keep getting RAS error code 31:
Mobile connection not possible.

- Set your current mobile device as the default
device in the 'Manage Devices' view
- Ensure that no other programs are using your
mobile device and try again in a short while
- Delete the device in the 'Manage Devices' view,
add it back again, and then try connecting.

If this error persists, please contact Support
at your mobile network operator.

Support information:
RAS error code 31

It's working perfectly okay on XP (SP3), but seems to have serious problems with my Windows 7, no matter how many times I uninstalled and installed the drivers. Updated firmware, updated software, performed system restore, nothing worked. I shall give up very soon, throwing the darn thing out the window I really wouldn't want to make a clean install, it would take ages to transfer back everything to my pc. Really hoping that someone has a solution to this problem

My System SpecsSystem Spec
26 May 2011   #2

Windows 7 Ultimate 64 bit SP1

Double check if you have the right drivers for win7 32 bit ( may called x86).
Unlike softwares, drivers are made for each windows edition.
My System SpecsSystem Spec
26 May 2011   #3

Microsoft Community Contributor Award Recipient

Win 7 Home Premium 64bit Ver 6.1.7600 Build 7601 - SP1

Hi! murron, welcome to 7F

Your dilemma sounds similar to this one where you have tried everything: usb stick detection problem

Go to this post #4 by Bill2 in the same thread, and use the link provided there: usb stick detection problem

It may be as taupuz the OP was having trouble with drive letters, yours may be similar.

Follow these instructions provided to clear the conflict, and see if it helps your situation: Cruzer flash drive could not be detected due to drive letter conflict

The fix is the same even if you do not have a Cruzer drive.
My System SpecsSystem Spec

26 May 2011   #4

Microsoft Community Contributor Award Recipient


Hello murron and welcome to Seven Forums.

Part of the problem might be the age of the dongle (when it was manufactured by Huawei.) They may not have upgraded their drivers to work with Windows 7. It's possible they might have a Vista driver that would work in compatibility mode although I didn't see one.

Have you contacted their support team to see if they actually have a driver for 7?

Technical Support - Welcome to
My System SpecsSystem Spec
26 May 2011   #5

Windows 7 Home Premium 32bit SP1

Thanks for the responses, everyone.
Anak, although I had no conflicting drive letters, I tried the link you provided said. No success
Marsmimar, there is no such thing as support team for Huawei. I have found a Win 7 driver in a 2 year old thread (their forum has closed down since), but it didn't help me either.
My System SpecsSystem Spec
26 May 2011   #6

Microsoft Community Contributor Award Recipient

Win 7 Home Premium 64bit Ver 6.1.7600 Build 7601 - SP1

Have you seen this link? There seems to be two solutions that may work. Huawei E220 driver for Windows 7 Read the whole thread.
Of course you would have to substitute the 3715 wherever it says 220.

I did not go into exploring the links that kabous0834 or driekwartappel provided in the above link, but there may be firmware for your 3715 listed at those links.
My System SpecsSystem Spec

 USB stick problem - error 31

Thread Tools

Similar help and support threads
Thread Forum
Reformating USB Stick Problem
Hello so something has happend to my USB stick it has completly wiped its self and I cant reformat it does anyone know why, Thanks for any help
Hardware & Devices
Driver install problem - USB stick and USB Ext HD
Hi, I've got problems installing USB external hard driver and USB memory stick driver on windows 7 pro 64 bit. The computer is a Lenovo t410s, intel chipset. The external disc drive is a Western Digital Elements SE 1 TB and the USB memory stick is of the brand TwinMos. At first I could not...
Transferring Movie From PC To USB Memory Stick problem
Hi, Can't understand what is happening here. I just bought from Amazon a brand new USB Memory Stick; a Sandisk; 32 GB. I have a movie that I took that is on my PC (running W7) that I want to transfer to the Sandisk. The movie is about 7 GB in size, so it "should" fit just...
General Discussion
Windows 7 installation from USB stick now USB stick not working?!
I am just starting out learning Windows 7. I am reading an ebook by Mclean and Thomas titled “Configuring Windows 7” In chapter 1 regarding installing Windows 7 using a USB source, the procedure to prepare the USB device is as follows: 1. Connect the USB storage device to a computer running...
Installation & Setup
USB stick error 10
How can I retrieve my data in my flash device? It was error 43 then after reboot it was error 10. Can I make it work again?:cry: Please can someone help?
Hardware & Devices
usb stick detection problem
i got a problem with a usb stick, when plugged into computer i see the light on the stick turn on, and then off, and that's is. i thought it was finished, broken, untill i plugged it into a friends computer and it worked fine. i plugged it into the same computer on a different partition, same...
General Discussion

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd

All times are GMT -5. The time now is 11:28.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App