After you install Windows on a computer, is recommended to make at least another hard drive partition where to keep regular files such as pictures, Word documents, software kits etc.
In case your Windows fails – if is infected by a virus for example, you need to reinstall it and this means that you must format the drive C:\ and you will lose all data from that drive. So, if you keep personal files on another partition (for example, D:\), when you reinstall Windows you will not lose files from D:\
Windows includes a free tool called Disk Management to create new partitions, but probably is not the easiest way for beginners to create new partitions. There are many third-party programs able to do it.
Windows 7/8
Method 1: Using EaseUS Partition Master
This is a free program for personal use. It works for all versions of Windows, including Vista/XP.
1 Download EaseUS Partition Master
2 Start the program
3 Resize partition
Since I need 10GB for my new partition, i will set the new size of C:\ to be 51338.0 MB
The Unallocated space after will be used to create the new partition K:\
Click Ok.
4 Create new partition
Select it, then click on Create partition
5 Choose drive letter
Then click Ok.
6 Restart PC
7 Wait
8 The result
Method 2: Using Disk Management
This is a feature already present in Windows 7/8.
1 Go to Disk Management
2 Shrink Volume
Then click Shrink Volume
3 Enter the size
I will create a 10GB partition, so I enter 10000 MB
Then click Ok.
4 New Simple Volume
We will use this Unallocated space (the space taken from C:\) to create our new partition.
Right click on the block with Unallocated space, then choose New Simple Volume
5 Choose Drive Letter
6 Click Finish
Then wait a few minutes until will finish, then restart the computer.