Win7 system disk expansion

computer used after a period of time, I feel that C disk capacity is not enough, let's talk about Win7 system disk expansion:
Win7 system does not support expansion system disk hard disk space by default.
Verify it, the following method is reliable:
1. First set the virtual memory of all hard disk partitions to
no paging file
2. Download an open source partition assistant, have a professional system disk partition Wizard
3. After completing the expansion, set the virtual memory of all hard disk partitions to System manage size,
and restart the computer