Was told to 'Merge' a .reg

I feel real stupid asking this but here goes.

When I ran SFC/Scannow a couple weeks ago it broke my email program. I was able to get it back thru System Restore but have been told that it will happen anytime I run sfc unless I apply this Merge fix but wasn't told any more details. I'm spooked about 'just clicking' on something I'm not familiar with. Some things are just 'click on', some are 'right click on'. I don't know what to do here. Will post a screen shot of what I'm referring to.

Thank you.
Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: AMD Athlon(tm) II X2 220 Processor, AMD64 Family 16 Model 6 Stepping 3
Processor Count: 2
RAM: 2815 Mb
Graphics Card: NVIDIA GeForce 6150SE nForce 430, 256 Mb
Hard Drives: C: Total - 933767 MB, Free - 814630 MB;
Motherboard: eMachines, EL1358G
Antivirus: avast! Antivirus, Updated and Enabled

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