我想window7內裝虛疑xp 20分

There is an original microsoft VM -- best and proven XP emulator in Win7.
You may download them (Virtual PC 2007 and XP mode -- no need to install XP from scratch) from micosoft....but only if you have genuine Win7 installed:
http://www.microsoft.com/windows/virtual-pc/download.aspx

OTHERWISE use SUN virtualbox, a 3rd party VM:
http://www.virtualbox.org/wiki/Downloads
....but you have to install your own WinXP inside the installed virtualbox.

2010-06-29 13:51:17 補充：
It seems Virtual PC 2007 cannot be installed under Win 7 HOME BASIC. Only Win 7 Home Premium, Professional or Ultimate can do.

VM = virtual machine
是一套在你現在用的作業系統虛擬一個機器,從然讓你安裝不同的作業系統
使用方法很單簡.
大慨
1) 選擇要安裝的O/S,
2) Disk Area 靜態還是動態`
十分簡單
這套軟件某年被 漸微 (microsoft) 收購了, 和 WINDOWS的相容性很好,

給你LINK, 下載安裝便可使用

http://www.microsoft.com/windows/virtual-pc/

如果你部機夠勁, 在VM 入面做乜都得.
VM 可以 SHARE 網路 ,DVD-ROM , FOLDER 等等, 好方便.
功能自己探索一下,
建議選動態 Disk Area 不用浪費空間.