reinstall part of win 7

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: Intel(R) Pentium(R) CPU P6200 @ 2.13GHz, Intel64 Family 6 Model 37 Stepping 5
Processor Count: 2
RAM: 1844 Mb
Graphics Card: Intel(R) HD Graphics, 730 Mb
Hard Drives: C: Total - 260242 MB, Free - 157698 MB; D: Total - 29690 MB, Free - 27592 MB; G: Total - 305211 MB, Free - 92641 MB;
Motherboard: LENOVO, MoutCook
Antivirus: avast! Antivirus, Updated and Enabled

I am having trouble with win live mail. I think it better reinstall it. How do I do it? Can it be done?

thanks Frank