I have an acer laptop that (unsure of what model) has this problem where if my w key is held it down for a while, after I let go it'll still continue registering that key. Depending on how long i had held it for as it seems the longer i hold it, the longer it will keep going after i let it go. I've seen other people with this problem but they generally dont have solutions and the ones they do have seem rather vague. I use my laptops keyboard and not an external one