David H. Lipman wrote:
> From: "FromTheRafters" <erratic@nomail.afraid.org>
>
> David S>> wrote:
>>> On Saturday, April 28, 2012 6:22:27 PM UTC-4, David H. Lipman wrote:
>>>> From: "David S>"<david.smith7592@gmail.com>
>>>>
>>>>> The mouse has changed many times -right now a Logitech M515
>>>>> (wireless),
>>>>> before that
>>>>> Microsoft 3500 wireless (used a battery every 3 weeks!!!),
>>>>> different USB
>>>>> mice -mainly
>>>>> Logitech. This issue has been going on for 5 years or so, many mice
>>>>> and 2
>>>>> laptops.
>>>>
>>>> Please don't reply to yourself (especially with multiple copies)
>>>> reply to
>>>> those who reply to you.
>>>>
>>>> Oh, a Google Grouper - explaans all :-(
>>>>
>>>> If you use a wireless mouse and someone who is near you using a
>>>> wireless
>>>> mouse oin the same channel might affect your mouse.
>>>>
>>>> Use a wired mouse and see how that goes.
>>>>
>>>> --
>>>> Dave
>>>> Multi-AV Scanning Tool - http://multi-av.thespykiller.co.uk
>>>> http://www.pctipp.ch/downloads/dl/35905.asp
>>>
>>> I am the only one with a wireless mouse -5-6 years this has benn
>>> going on -I am pretty
>>> sure with all the different mice and computers I have used it is not
>>> a mouse issue.
>>> (soory I used the wrong post reply button last time -I think).
>>
>> Hospital equipment can also cause interference, have you looked into
>> that angle - EMI?
>>
>> Bottom line - your problem doesn't sound like a software issue
>> (malware/spyware). Try a wired mouse as David has suggested, the
>> process of elimination is a powerful troubleshooting tool.
>
> Yes, that's a good point that some other EMI/RFI equipment can
> interfere. Albeit, it probably would jam the mouse transmission rather
> than cause erratic behaviour. But, its possible.
>
> I have seen radio-telephones (the type that plug into a base unit to
> keep the hand-set charged and wirelessly connect back to the base unit)
> often kill DSL connections. A clam-shell, ferrite, toroidal filter is
> good for filtering out the RFI from the twisted pair POTS wiring. Just
> open the torroid clam, wrap the telephone line around the core and the
> snap the toroid closed. Since it is a common mode filter, it doesn't
> effect the Quadrature Amplitude Modulation (QAM) used in DSL.

I've seen cat hair in the keyboard cause erratic behavior, but I didn't
want to go there because it sounds so crazy.