Even then, you cannot upgrade to a lesser version-say, from Vista Ultimate to a Windows 7 Home Premium.

即便如此，你不能升级至较低版本——即是说，不能从Vista旗舰版升级至Windows 7家庭高级版。

youdao

This applies to Vista Home Premium, Business, or Ultimate editions.

适用于Vista家庭高级版、商业版、旗舰版。

youdao

Anyways, no complaints here -- Toshiba didn't hold back with its new A135 15.4-inch laptops, and you can nab your own with Windows Vista Home Premium of Windows Vista Ultimate on January 30th.

ENGADGET: Toshiba's new Satellite A135 laptop lineup sports Vista

Moving on, we've got the Ion-based HTPC, which is outfitted with a 1.6GHz Atom 230 CPU, Vista Ultimate (64-bit), 4GB of DDR2-667 RAM, an OCZ 120GB SSD, Blu-ray drive, gigabit Ethernet, WiFi, HDMI output and a multicard reader.

ENGADGET: OCZ intros 17-inch DIY laptop, Ion-based HTPC / Neutrino netbook

Upgrades will be tier-for-tier, with Vista Home Premium users getting to switch up to Windows 7 Home Premium when the time is right, Vista Business to Windows 7 Professional, and Vista Ultimate users getting an upgrade to Windows 7 Ultimate.

ENGADGET: Windows 7 upgrade details released?