我那个 netbook 用 windows 7 starter,  去年在网上找了个CODE,升级到 windows 7 ultimate.  用的蛮好的但最近不行了,得要花 $169 升级,或者用回 windows 7 starter 
		 
		
	 
From		$469.00
You Save		$170.00
Now		$299.00
Components
4GB Shared Single Channel DDR3 at 1600MHz
320GB 5400 RPM SATA Hard Drive
1 Year Basic Limited Warranty and 1 Year NBD Onsite Service
Also Includes
UBUNTU Linux
Vostro 2520 BTX
2nd Generation Intel® Core™ i3-2348M processor (3M Cache, 2.3 GHz)
No Productivity Software
Intel® HD Graphics/HD Graphics 3000
Documentation, US
No Security Software Requested
London Slate Gray
Power cord, 125V, 1M, US
8X CD / DVD Burner (Dual Layer DVD+/-R Drive)
Wireless 802.11b/g/n, Bluetooth v4.0+LE
Integrated 10/100/1000 Network Card
Dell Chiclet Keyboard w/ Multi-touch Touchpad
Lithium Ion Battery (6-Cell)
Dell SRV Software 1703/1704
15.6” High Definition (720p) LED with Anti-Glare™
Shipping Material
UBUNTU
CAR15MLK1401_034/BTO/C1
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From		$610.00
You Save		$241.00
Now		$369.001
Components
Windows 7 Professional SP1, 64-bit, English
No Microsoft® Office
Trend Micro Titanium, 15 Month,MUI
4GB Shared Single Channel DDR3 at 1600MHz
320GB 5400 RPM SATA Hard Drive
1 Year ProSupport and 1 Year NBD Onsite Service
Also Includes
Vostro 2520 BTX
2nd Generation Intel® Core™ i3-2348M processor (3M Cache, 2.3 GHz)
Intel® HD Graphics/HD Graphics 3000
Documentation, US
London Slate Gray
Power cord, 125V, 1M, US
8X CD / DVD Burner (Dual Layer DVD+/-R Drive)
Wireless 802.11b/g/n, Bluetooth v4.0+LE
Integrated 10/100/1000 Network Card
Dell Chiclet Keyboard w/ Multi-touch Touchpad
Lithium Ion Battery (6-Cell)
Dell SRV Software 1703/1704
Adobe® Reader X
15.6” High Definition (720p) LED with Anti-Glare™
Shipping Material
Additional Software with XP
CAR15MLK1401_034/BTO/C1