Distorted type

I am running Windows 7/64 on a Dell Inspiron. Advanced age has created mild visual problems (need higher contrast, sometimes magnification, etc). I tried adjusting the Accommodation settings and have done something that is causing the print to be choppy and distorted (see attached screenshot). If I mouse over it and/or highlight it, the print will become normal, but may not stay that way, and besides, it is a nuisance having to do that. I've gone back several times but cannot recall or determine what I did to cause this.

Does anyone recognize this defect? Can you tell me where to start? Thanks

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Professional, Service Pack 1, 64 bit
Processor: AMD Athlon(tm) Processor 2650e, AMD64 Family 15 Model 127 Stepping 2
Processor Count: 1
RAM: 3838 Mb
Graphics Card: ATI Radeon HD 3200 Graphics, 256 Mb
Hard Drives: C: Total - 694104 MB, Free - 558454 MB;
Motherboard: Dell Inc., 03D1TV
Antivirus: AVG Internet Security 2013, Updated and Enabled

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