WASD movement keys stop working

I recently started a new run of ME3, I loaded a ME2 charater up and started the game. I soon found the WASD keys intermittently stopped working.

I'd be moving forward, but couldn't strafe using A or D, or I'd stop to click on something and found A and D worked but now W stopped responding. This made the Mars turret room rather challenging. I then found if I pressed the CTRL key (walk) I could then use the movement keys successfully.

I can;t very well play the whole game holding the CTRL key down, so this is making the game unplayable.

There is nothing wrong with my keyboard, and it doesn't happen in any other games. 

I'm running Windows 10, but have played the game several times previously with W10 and had no problems.

I've seen similar problems on this forum and tried the suggested fixes. I just recently reinstalled Origin (before I started up ME3) since I also got the Origin won't start bug after a patch.

I tried vrifying the files for the game in Origin, but that made no difference. I'm now reinstalling it.

Does anyone have any other suggestions, if the install doesn't work?