Disk space is not enough

In this semester(2011 spring), I selected the course that is programming for cloud computing in Ph.D program. I check the C:\ disk space in office desktop, and the Windows 7 disk space is not enough for the course. So I should delete some files or uninstall useless software in Windows 7 partition.

I found the below two files which was so big in disk, and I decided to delete it for installing M$ visual studio 2010.
1. hiberfil.sys : 2GB for  poweroff
2. pagefile.sys : 3GB for virtual memory

First, I want to delete pagefile.sys, the step as following:

1. 控制台->系統及安全 ->進階系統設定->進階 tab, 效能選項 , 設定-> 進階 tab, 變更 -> 取消自動管理分頁大小 -> 取消分頁或者調整到其他的磁碟( desktop change to "software" partition)
2. reboot system

Next, I deleted the hiberfil.sys file, the step as following:[1]

1. 在輸入指令的地方輸入 cmd，但是不要直接按「enter」鍵，選上方的「cmd.exe」，然後按右鍵
2. 輸入 powercfg /h off
3. reboot system

要再次開啟休眠的功能，可以參考[1] 的說明
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[1] http://alexchuo.blogspot.com/2010/03/windows-vista-windows-7-windows-server.html