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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
05 Aug 2015   #5

Windows 7 Professional x64

On different machines, the GUID in RegEdit may be different from the one the initial post referred to. Go to Device Manager, select the mouse device, get Properties, and look for "Device-class guid" -- that is the value you should then look for in RegEdit.
My System SpecsSystem Spec
12 Aug 2015   #6

Windows 7 Professional x64
An even simpler fix

I've had the same problem with a USB mouse disconnecting and reconnecting. After reading these posts, I swapped in a different mouse and the problem stopped, confirming that the original mouse was the problem. Then I inspected the original mouse, and found that some of the cable sheath had been worn away by contact with other components. This was undoubtedly causing it to short when in contact with metal or perhaps even moisture. I've applied a penny's worth of electrical tape and have reinstalled the original mouse. So far, so good.
My System SpecsSystem Spec
04 Sep 2015   #7

Win 7 Ultimate x64

this is a hardware issue and nothing to do with your registry or anti-virus. (I do not use any AV or security software whatsoever, because I have common sense) this 'fix' is nonsense. in rare cases this can be caused by a conflict with your USB controller, but 99% of the time it's caused by a faulty mouse or a faulty port.
My System SpecsSystem Spec
30 Sep 2015   #8

Windows 7 Pro x64

If this happens after your mouse is idled for a while (whether for when you are not using your computer, or when you are watching a video so that you are not using your mouse), it is possible that it happens because your computer cuts the USB power to save energy. There are two settings to adjust to disable USB power cut:

Go to Start > Control Panel > Hardware and Sound > Device Manager (under Devices and Printers)
Right click on "USB Root Hub" under Universal Serial Bus Controllers, and go to "Properties."
In USB Root Hub Properties go to the Power Management tab, and uncheck "Allow the computer to turn off this device to save power." Click on "OK" when done.

If this doesn't help, there's another place you need to check...

Go to Start > Control Panel > System and Security > Power Options
Click on the "Change plan settings" of your plan, and then click on "Advanced settings."
In Advanced settings find "USB settings" > "USB selective suspend setting," and choose "Disable" in the setting. Click on "Apply" when done.

Hope these would help.
My System SpecsSystem Spec
30 Dec 2017   #9

Windows 7 Ultimate x64
It worked for me

Thanks for the solution, although I did something different because for some reason UpperFilter keep reverting back, I just delete the mouclass instead of the klmouflt, no disconnection so far for hours. Saved me from buying a new mouse here from my perfectly working razer naga 2014 after years. Thank you very much for the solution, good sir.

I'm on windows 10 x64 by the way, if anyone might be wondering the reverting might be caused by win 10 but I dunno.

Edited: Never mind, my problem still persists. Perhaps it's my mouse, or my usb port, since it affects my keyboard as well. So, it didn't work for me, thanks for the information tho.
My System SpecsSystem Spec

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

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