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  1. #1
    2 Star Lounger
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    Dec 2003
    Bothell, Washington, USA
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    Windows 7 Pro - Mouse erratic and sluggish. Pointer moves by itself

    A problem with the mouse. Or at least it manifests with the mouse. The problem is that the mouse, when moving is very sluggish. It appears to stick momentarily at points
    along the line of movement. Also if I let go and don't touch the mouse the pointer/cursor moves by itself for 2 to 3 seconds. The problem is very obvious when playing Solitaire but also
    many other applicatoins and most Windows activities.

    It is difficult to click on links since the mouse moves slightly without my control.

    I suspected a virus but I ran a full scan of the PC and found no viruses. My antivirus subscription is current and up to date.

    I tried uninstalling the mouse and then reinstalling it. This had no effect on this problem.
    I want to refresh the mouse drivers but I assume that uninstalling and installing the mouse would accomplish that.

    The following mouse drivers are present

    Of the above 3 drivers, the first one, klmouflt.sys, is owned and provided by my antivirus company.
    The other two drivers are Microsoft.

    I don't know what the antivirus company is doing with a mouse driver but I have subscribed to that antivirus company for 4 or 5 years and this mouse problem just started 1 week ago.

    Anyone know what is causing this?

    - Windows 7 Pro, 64-bit, SP1

  2. #2
    Silver Lounger CaDesertRat's Avatar
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    Feb 2013
    Mojave Desert CA
    Thanked 274 Times in 225 Posts
    That's happened to me before and it was a bad mouse. They are pretty cheap, try a new one. That's what I did and it cured the problem.
    Hope this helps.

  3. #3
    Administrator Rick Corbett's Avatar
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    Dec 2009
    South Glos., UK
    Thanked 1,093 Times in 864 Posts
    As lumpy95 suggests, try another mouse.

    Just in case it's related to a recent Kaspersky update, try temporarily disabling tour Kaspersky AV. Sorry but I have no experience of KAV so have no idea whether this is possible. However, it appears that klmouflt.sys is an anti-keylogger driver.

    Hope this helps...

  4. #4
    WS Lounge VIP Lugh's Avatar
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    Jun 2010
    Thanked 287 Times in 239 Posts
    DG, clean the underside, especially around the optical part. Could easily be a piece of lint or hair in there which would cause the behavior you describe. Also check the surface you move the mouse on, try it on a different surface.

    Is it a generic mouse or from a company which supplies its own drivers—eg Logitech?
    Does it connect via USB or PS2, or is it wireless?
    If it's battery driven, change the battery.
    How old is it? Could be worn out, as the guys suggest.

    Do you see any error or info flags in Device Manager?
    Dell Alienware Aurora R6; Win10 Home x64 1803; Office 365 x32
    i7-7700; GeForce GTX 1060; 16GB DDR4 2400; 2 x 256G SSD, 4TB HD

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