windows 8

my page keeps scrolling up and down when I type and the font is constantly changing when I type how can I stop this.
Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 8.1 with Bing, 64 bit
Processor: Intel(R) Celeron(R) CPU N2840 @ 2.16GHz, Intel64 Family 6 Model 55 Stepping 8
Processor Count: 2
RAM: 3986 Mb
Graphics Card: Intel(R) HD Graphics, -2038 Mb
Hard Drives: C: Total - 455281 MB, Free - 421604 MB; D: Total - 20613 MB, Free - 2070 MB;
Motherboard: Hewlett-Packard, 233F
Antivirus: McAfee Anti-Virus and Anti-Spyware, Updated and Enabled