Jumping Text - all text typed jumps to other parts of input screen
As I type text instead of flowing it randomly jumps to another part of the input screen, usually within other sentences but sometimes 3 or so rows after the last line being typed. This occurs in all Office 2010 programs but also in browser input screens of all types. My Win 7 Home Premium 32bit is genuine as is my Office 2010 suite. I use AVG Free for my virus protection and Windows Firewall is set to on. Do I have to re-run my Win 7 installation?