Data Transfer Rate, in simple words, is the amount of digital data that is moved from one place to another in a given time. The more the rate, the higher the speed.
If you work in a high-bandwidth and low-latency network environment, and you find that the data transfer speed is slow while using your Windows 7, you might want to read this article.
Now in Windows 7, this issue occurs because TCP window scaling does not work when network latency is between 1 millisecond and 8 milliseconds.
If you want to fix this problem, you can request Fix387621 from Microsoft. Once you accept the conditions, you will be able to download and apply the fix. Do note that after you have applied this hotfix, you will have to restart your Windows computer.
Actually, Microsoft has confirmed that this is a problem being faced by many users of Windows 7 Enterprise, Windows 7 Home Basic, Windows 7 Home Premium, Windows 7 Professional, Windows 7 Starter, Windows 7 Ultimate, Windows Server 2008 R2 Datacenter, Windows Server 2008 R2 Standard, Windows Server 2008 R2 Enterprise, Windows Server 2008 R2 Foundation and Windows Server 2008 R2 for Itanium-Based Systems – as a result of which they have decided to release this fix. You can read more at KB2675785.