windows registry

regedit is the command to invoke registry editor.
it can be used for windows TCP tuning.

The Windows Registry is a hierarchical database that stores
configuration settings and options on Microsoft Windows operating
 systems. It contains settings for low-level operating system
 components as well as the applications running on the platform: the
 kernel, device drivers, services, SAM, user interface and third party
 applications all make use of the Registry. The registry also provides a
 means to access counters for profiling system performance.

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