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

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

The J PC runs a Core 2 Duo or Athlon 64 FX, Windows Vista Ultimate, 8GB of DRAM, NVIDIA GeForce 8800GTX 768MB of RAM, 2TB of 7, 200 SATA storage, Blu-ray or HD DVD drive and plenty more trimmings like a 7-inch built-in screen, TV tuner and 7.1-channel sound.

ENGADGET: Moneual for a million: Jewelry PC demands dramatic pricetag

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?