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 mouse keeps disconnecting / connecting FIX! Windows 7 SOLVED!!!!!

15 Sep 2012   #1

Windows 7 Home Premium X64
usb mouse keeps disconnecting / connecting FIX! Windows 7 SOLVED!!!!!

Ok i know this isn't asking for help gut a google search shows 100's of people with the same issue.

None of the suggestions have ever worked.

Yes i tried EVERYTHING!!!!

1. New usb mouse, bought 2 new ones, one wireless, one wired + my old one. all 3 have the same issue and all 3 work fine on my old XP machine. IT IS NOT THE MOUSE!

2. Tried updating the drivers including, mouse, usb hub, generic usb, and chipset. IT IS NONE OF THESE!

3. Turned off (un-ticked) power management "turn it off to save power". NO AFFECT!

4. un-installed the usb hub as well as the mouse. STILL NO JOY!

5. Rolled back the driver. NADA, STILL THE SAME!


7. Tried the usb driver fix from USB Driver - General Fix for Problems BUT IT IS STILL HAPPENING!

8. Issue affects USB 2.0 and 3.0 ports, I'VE TRIED ALL MY USB PORTS ITS NOT THEM!

9. It does not affect any other USB devices such as printer or scanner etc, IT IS JUST USB MOUSE AFFECTED!


11. Tried cleaning contacts, IT IS NOT THEM!

SO HERE IS THE FIX i found worked for me.

So this requires you to edit the registry so come with risk, to help minimise the risk you need to backup the registry first!

To backup the registry or restore it please see this thread Registry - Backup and Restore

Ok having done that i found my antivirus (kaspersky) had altered the mouse upper filter value to read klmouflt mouclass.

*******NOTE******* Your antivirus may have a different name to klmouflt

Removing Kaspersky's value "klmouflt" and returning it to its default "mouclass" resolved the issue.

so to change it back to default you need to

Click the windows orb (start icon in the toolbar bottom left of the screen) and in the search.

type Regedit, and then click OK.
Click the plus sign (+) next to HKEY_LOCAL_MACHINE.
Click the plus sign (+) next to SYSTEM.
Click the plus sign (+) next to CurrentControlSet.
Click the plus sign (+) next to Control.
Click the plus sign (+) next to Class.
Click {4D36E965-E325-11CE-BFC1-08002BE10318}.
On the left hand side of the window, click UpperFilters.
Click Edit on the menu bar
Delete klmouflt so it just says mouclass
and save and then exit.

Reboot the machine just to be sure.

Your mouse will now work without issue.

Just to say an antivirus update MAY rewrite the registry and you MAY have to follow the steps again in the future.

Hopefully this will get google indexed and others will also find this useful.

My System SpecsSystem Spec

12 Aug 2014   #2

windows 7 x64

After selecting edit on menu bar. Then hitting Modify. I was given no option to delete klmoufilt. I only had a single word NTIDrvr
My System SpecsSystem Spec
03 Sep 2014   #3

Windows 8.1 64bit

Quote   Quote: Originally Posted by kevinhunt View Post
After selecting edit on menu bar. Then hitting Modify. I was given no option to delete klmoufilt. I only had a single word NTIDrvr
Hey kevin. Instead of following his exact reg value, scroll through every entry under Class and look at the right hand side of the Registry Editor window; the one with the Name, Type, and Data tabs. Find the one that says "Mouse" on the data then edit the UpperFilters for that one.
My System SpecsSystem Spec

22 Sep 2014   #4

Windows 7 Pro 64-bit

I tried every single fix listed in Mentalpen's post, the suggested fixes that followed, as well as several others from various threads: NOTHING WORKED

(For reference, I have a Lenovo B560 laptop with Win7Pro64, 4GB mem, AVG, and a Logitech MX518 corded mouse)

Then I tried a couple of different things that were not listed as potential fixes:

1. Changed mouse pointer theme from "Aero" to "none"
2. Removed and DID NOT re-install the drivers for my mouse
3. Ran "usbdeview" twice to remove all remnants of pre-installed usb devices, leaving only my current mouse and keyboard

While this may not work for everyone, it seems to have helped me maintain my sanity. Mouse hasn't disconnected in several hours.
My System SpecsSystem Spec

 usb mouse keeps disconnecting / connecting FIX! Windows 7 SOLVED!!!!!

Thread Tools

Similar help and support threads for2: usb mouse keeps disconnecting / connecting FIX! Windows 7 SOLVED!!!!!
Thread Forum
Solved Mouse Consistently Disconnecting Hardware & Devices
VPN starting connecting authenticating and disconnecting same time Network & Sharing
Keep connecting/disconnecting from wireless network Network & Sharing
connecting/disconnecting Firewire = BSOD BSOD Help and Support
USB drive connecting and disconnecting constantly Hardware & Devices
phantom drive repeatedly connecting/disconnecting Hardware & Devices
unusal svchost.exe cpu 100% usage whenever connecting/disconnecting to Network & Sharing

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 03:52 PM.
Twitter Facebook Google+

Windows 7 Forums

Seven Forums Android App Seven Forums IOS App

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33