Well, I think I have found a solution to this problem. I'm not sure if your issue is similar or not or just affects outlook but I thought I'd let you know what we tried as I found reports of people with similar issues and most of the time one of the steps we tried usually solves the issue, just not for us unfortunately.Īnyway if you find a solution please let me know (in case it's something we haven't tried) and if I do I'll let you know in case it helps. We're currently building a complete brand new PC for the user in question but so far we've not been able to find anything hardware or software related to explain the issue. The HD with a new one and new Windows 7 / Outlook 2010 build and even using the old HD build in a new PC and they all had the same issue. We tried replacing the mouse and the mouse drivers, using different USB ports (according to dell some of their PCs prefer the mouse and keyboard plugged into the 2 USBs beside the network port as sometimes there can be issues when in the others), swapping In our case it started with Outlook but then seemed to be randomly registering double clicks in all programs even windows explorer itself. We've had a PC that has started doing similar things in the last month.