Windows 7 - Upgrade or Clean Install Which is better?

Should I choose Upgrade to Upgrade Vista Ultimate to Windows 7 Ultimate
or Clean Install from Windows Vista reformat and reinstall Everything

But What if i get a virus before i do upgrade

What if i choose upgrade they say windows 7 fster but being slugish when doing upgrade?

Most of the users here ( myself included ) recommend doing a clean install of any operating system... When you upgrade, you run the risk of keeping a lot of left over garbage from the previous OS... I have heard of upgrades taking 8 hours or better to finish... Do a clean install.. you'll be glad you did..

I had tried both: clean installation 30min, upgrade 3hours.

And there's your answer, as it will also help to troubleshoot should you run into any issues, and Samuelg makes a good point too.

OK could people help if any drivers dont work with windows 7 ultimate i have an acer aspire 5735 4gb ram 160gb hard drive intel core 2 duo t5800 2ghz

I wont to know if all drivers will work with it properly?

on da acer site found my acer model for drivers choosen windows 7 ultiomate x64 says "This page shows only drivers that are not contained in Windows 7."

i dont get it?

OK could people help if any drivers dont work with windows 7 ultimate i have an acer aspire 5735 4gb ram 160gb hard drive intel core 2 duo t5800 2ghz

I wont to know if all drivers will work with it properly?

on da acer site found my acer model for drivers choosen windows 7 ultiomate x64 says "This page shows only drivers that are not contained in Windows 7."

i dont get it?

It means that if the driver you are looking for is not on that page, windows 7 will install it...

oh i can remmeber doign a clean install which drivers where not installed i had to instal them on windows 7 they already includ it BUT ARE THEY ACER ONES NOT DEFAULT RUBBISH ONES FROM MICROSOFT

Microsoft doesnt write device drivers, the manufacturer does... I dont intend to argue the subject...you asked a valid question and got several answers all saying the same thing...what you do now is up to you.... Ta...

See, Windows 7 includes many generic drivers. That means that if you install it, you will be able to use the machine at least, just maybe without a few hardware features.

So Acer has released their custom drivers. They only work with that specific hardware, but they work better.

If you have any doubts about compatibility, run the Windows 7 Upgrade Advisor. That is good to run, anyway.

Hope this helps,
~JK