How to improve the speed of win7 system

often after reading and writing to the disk, the storage of data on the disk will become very messy, often a file will be divided into several parts stored in different locations, which will not only easily lead to data corruption or Lost, and will seriously affect the speed of the win7 system. Therefore, it is necessary for us to periodically defragment the disk.
Step 1: Click win7"start”—“all programs”—“attachments”—“system tools”—“disk defragmenter” Command to start the disk defragmenter as shown in the following figure.

Step 2: Select the disk drive you need to organize, then click the “defragment” button.