1. Disable Microsoft Disk Defragmenter Tool*
To check Microsoft Disk Defragmenter Tool follow the steps below:
Click Start.
Click All Programs.
Click Accessories
Click System Tools.
Then click Disk Defragmenter.

2. Disable Indexing
To Disable Windows 7* Indexing, follow the steps below:
Click start then enter "services.msc" into the search field
Search through the list until you find "Windows Search" (Note: pressing “W” and it will go to all services starting with the letter W)
Double-click on Windows Search
Select startup type: "Disabled" from the dropdown field. Stop the service.

3. Disable Superfetch
To Disable Windows 7 Superfetch, follow the steps below:
Load the Services window by typing services.msc in Start Search.
Locate the SuperFetch key.
Double-click the SuperFetch key and it will open the Properties dialog window.
Disable it by changing the dropdown to Disabled.
Stop superfetching by clicking the Stop button.

4. Enable Write Caching
To Enable Windows 7 Write Caching, follow the steps below:
Click Start, right-click Computer and then select Properties.
In the left pane, click Device Manager.
Expand Disk Drives and right-click on the disk where you need to enable or disable Disk Write Caching and click properties.
Click the Policies tab and check "Enable Write Caching on the device" to enable (default).