Is assigning a different user possible?

I have a Acer Aspire One that crashed and blew smoke out the power plug hole a few weeks ago. I had Windows 7 installed on it. Sent it to the factory. They replaced the motherboard, keyboard, LCD cable and HARD DRIVE........ S'ok didn't loose any data. Knew I'd just re-install all of the programs I had before. When I turned it on, found that they had installed VISTA with an "User owner" of ACER. After reading found out that it was better to upgrade to Windows 7 than do a clean install, so that's what I did. Works good, except it still has an "user owner" (don't know what else to call it) of ACER. I'm the administrator, but when I install some software it says it's registered to ACER. Is there someway to change that over to me or do I have to do a clean install?
Thanks

I'll let someone else answer the changing of the registered owner, but where did you read that an upgrade is a better option than a clean install?

Clean installs are always the better option. Acer should have all the drivers and utilities you would need on their website. Then, with a clean install, you add to the system only what you want.

Deacon,
Here's where I got my upgrade information from......

Upgrading from Windows Vista to Windows 7 - Help & How-to - Microsoft Windows

Right in the middle of the screen - Upgrading it the most convenient way to get Windows 7 on your computer.......

Just following Microsoft's advice.....

Thanks for you help...

Is it the most convenient, in some ways because it will keep your programs and data, but that doesn't make it the best. Any time to do an upgrade, you are setting yourself up for problems and issues later on. These forums are littered with people having strange issues due to an upgrade. Don't always believe everything from a biased source.

If you asked every car salesman which cars were the safest, they'd tell you the brand they sell is the safest....but all of them besides Subaru and Volvo would be lying.

For the best possible system, a fresh, clean install with the lastest drivers is always the best way to go.