Same script, two Komputers, one works great, the other 50% of the time

Hi, i have a script that im using for automating firefox

It relies heavily on sending keys and click to the Firefox browser.

Much of which are controlsend and controlclick

On my personal computer it works great, not a single click is missed.

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On the laptop however, i end up in situations where it fails to send a simple "sendkey" to the browser, making the whole thing useless..

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Im aware of requirements of admin privileges, the script starts with making sure that those are in place. Botch machines are on default windows account (the one created from normal start) botch show as admin..

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What am i doing wrong ? why is the script on the laptop not working ?

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For the record it does work.. sometimes. the nature of what makes it work or not is not known to me.

i restart everything, scripts, windowses, browsers in hope of making it work, its not very sustainable for my piece of mind

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any ideas what might be causing this ?