When I switch on my pc and create emails it works perfectly then later when I click in Message box to start typing there is a ping and printing starts on the left of the cursor moving towards the left. For example Hello appears as olleH. It does not happen when I use Word or on online. I noticed that then I open a folder today with a lot of files I can't access any on the right hand side. It just springs back the the left. If I go to the foot of a message the cursor just moves all the way to the top. I can restart and it can be ok for a while. I've checked for trojans, malware, virus and it's clean. How can I find out what is causing this problem?