Can Win 7 be loaded and replace Win Vista on a laptop?

probably. you'll need a Win 7 license and install disk

Yeah,You can install win vista by bootable devices.There is no problem but win 7 is better choose.

If you’re ready to take the leap from Windows Vista to Windows 7 on your computer, the process is fairly simple. When you upgrade your computer from Windows Vista to Windows 7, first make sure you have a Vista service pack and use Windows 7’s Upgrade Advisor, which tells you what software or gadgets won’t run after you install Windows 7. Windows Vista usually fares the Upgrade Advisor’s exam pretty well.

1To find out what version of Vista you’re running, click the Start button, type winver into the Search box, and press Enter.

When the About Windows box appears, the words Service Pack 1 or Service Pack 2 should be listed on the box’s second line.

2If no service pack is listed, then grab it through Windows Update by clicking the Start menu, choosing All Programs, and clicking Windows Update.

Keep downloading all the updates marked “Important” until Microsoft slips you a copy of Service Pack 1.

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My HP that came with Windows XP could run Vista, but not Windows 7. A friend's Dell that came with Vista could run Windows 7.

If a Windows Vista be updated to Windows 7, yea. Though it depends on the computer in question

Yeah, put the windows 7 cd in and run the setup. Then choose the upgrade option.

yes it can