I'm facing the most unknown lag problem ever help technician please!!!

the problem happened since long time ago and i dont know how to fix this problem and it happens only on my account whenever i put it in any other pc even with gtx1080 and amd wherever while if i open my brother account on my pc its normal the champ move while mine if i changed to any other pc its do some weird lagg in moving my champ.. here some explanation with videos my brother account moving the champ https://www.youtube.com/watch?v=4WWSnxMcmA0 my account moving the champ https://www.youtube.com/watch?v=mVuDgOlC3gY and this video https://www.youtube.com/watch?v=-3z09lgdITI HELP RIOT TECHNICIANSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS
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