keyboard and mouse stop responding while surfing

[Fabrice]

i'm experiencing some very odd behaviour with my computer lately, that
i have no idea how to troubleshoot.
at what seems to be random moments (approx. once a day), while surfing
the internet, suddenly i lose all controls of my keyboard and mouse as
if they got suddenly unplugged.
display is completely fine and i can see the mouse pointer, but any
keyboard and mouse action does nothing at all ( thus CTR+ALT+DELETE is
useless).
pressing "Num Lock" key doesn't switch the LED on/off.
OTOH, i'm using a KVM switch in conjunction with another computer and
that seems fine, i'm able to switch from the problematic computer to
the another using the "double-CTRL+1 -2" keyboard command.

i'm using XP pro SP2 with all the latest updates including those for
anti-virus and anti-spyware.
AFAIK, i didn't install any program or did anything specific to the OS
just before that started happening.
even though most of the time i am able to recognise the symptoms and
causes of Windows problems, this one has me stumped.
any pointers...

many thanks.
Fabrice

 

[needlove]

what interface are your mouse and keyboard? USB 2.0? PS2?

If USB go into device manager and uninstall all Universal Serial Bus
controllers then reboot and windows will reinstall them.

 

[needlove]

look here too: http://support.microsoft.com/?kbid=310575

 

[Fabrice]

hi, thanks needlove.

my mouse is basic MS optical with a USB plug into a PS/2 adapter into
the KVM switch along with the keyboard too.
so there's no USB drivers involved here.
and why would it suddenly stop responding after say a few hours of
surfing?
everything is plugged in firmly, i haven't touched it for ages.

so weird, i have never heard of this problem before...

 

[Fabrice]

it is still happening, at random, really no idea about what is causing
it.
when rebooting, there isn't a single clue in the Event Viewer at the
time it happened.

anything i should try?
many thanks,
Fabrice

 

[Fabrice]

might as well talk to a dead horse...

it is still happening, at random, really no idea about what is causing
it.
when rebooting, there isn't a single clue in the Event Viewer at the
time it happened.

anything i should try?
many thanks,
Fabrice