Hello,
I've just registered specifically to comment on this, as I think others have done. This was exactly the problem for me. It was bad when I used the mouse, it was worse when I used the touchscreen. This Intel Technology Access Process was using almost 1.25 of 8 GB of memory and as soon as I ended the process, the computer started working again. And yes, this only started after the latest Windows update March 2015. I don't know what it's supposed to do, which is always fun when you have to end a process, but getting rid of it worked and nothing else currently appears to be effected by its lack.
Best advice: task manager, end that process.
Thank you everyone who responded earlier and confirmed my concerns and the solution!