johnnort Posted January 20, 2013 Share Posted January 20, 2013 Hello, A while back I removed a 3.5 IDE HD from an old PC running Windows XP I had been using. Putting this in a mains powered ´box´ and connecting to my Asus F55A laptop, running Windows 7, via a USB port has resulted in the pad mouse pointer going haywire. It moves around the screen without prompting. Disconnecting the external HD corrects the mouse pointer. I have checked the drivers for the pointing device and have erased the HD drive using C Cleaner after firstly extracting the required files. The problem still exists. Is it because of the two different OS´s, maybe? And is there anyone with any ideas on how to rectify the issue? It takes 5 minutes to position the mouse on an icon to click, and then it may jump off just as the pad is being pressed. Thanks. Link to comment Share on other sites More sharing options...
johnnort Posted January 20, 2013 Author Share Posted January 20, 2013 In addition to my post. I have tried connecting a 2.5 EXTERNAL HD in the same manner as the 3.5 HD and all works perfectly. Thank you. Link to comment Share on other sites More sharing options...
RandomSand Posted January 21, 2013 Share Posted January 21, 2013 Try another cable and try another USB port and post back the results. Link to comment Share on other sites More sharing options...
Gregory Morozov Posted January 21, 2013 Share Posted January 21, 2013 The most likely reason is the dodgy power supply or your external box creating electrical interference that propagates across all USB circuits. Mouse pad is connected via USB internally. Link to comment Share on other sites More sharing options...
rakman Posted January 21, 2013 Share Posted January 21, 2013 it could be a power grab from the USB drive pulling down the power of the USB controller. An external powered USB hub would help with that. Or it could be the USB driver processing adjustments, but most likely the USB power is the culprit. Link to comment Share on other sites More sharing options...
Gregory Morozov Posted January 21, 2013 Share Posted January 21, 2013 Sorry, made a typo, "power supply of the external box". Link to comment Share on other sites More sharing options...
johnnort Posted January 21, 2013 Author Share Posted January 21, 2013 Thank you everyone. There is such a wealth of information out there. I can understand fully the external power thing, but is there anyway to rectify this problem? Link to comment Share on other sites More sharing options...
johnnort Posted January 21, 2013 Author Share Posted January 21, 2013 Solution guys!!!!! Jiggled all the cables around and found that if the 7 pin? power connection entering the HD was held in a certain position the problem disappeared. Many thanks once again. Link to comment Share on other sites More sharing options...
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