will upgrading affect user accounts

I am about to install Vista as an upgrade to WinXP.
My question is will it affect the user accounts in any way? Will I and the other family members using the PC be able to log in OK and use all their files etc no problem?
Also, on a similar note, will program installation settings remain OK or will the upgrade require me to reinstall everything?
Jon

STOP IMMEDIATELY!!!
Do not install Vista as an "update" since it is still Beta software. Microsoft ONLY recommends a CLEAN install and on a NON-PRODUCTION system.
YOU RISK LOSING ANYTHING, OR EVERYTHING, YOU HAVE ON YOUR CURRENT XP SYSTEM!!!
DJjay wrote:

I am about to install Vista as an upgrade to WinXP.
My question is will it affect the user accounts in any way? Will I and the other family members using the PC be able to log in OK and use all their files etc no problem?
Also, on a similar note, will program installation settings remain OK or will the upgrade require me to reinstall everything?
Jon

Regardless of wether you do a clean install or an upgrade, you will lose everything on your disk, unless you install Vista on a seperate partition and use a dual boot scenario.
"Rick" wrote:

STOP IMMEDIATELY!!!
Do not install Vista as an "update" since it is still Beta software. Microsoft ONLY recommends a CLEAN install and on a NON-PRODUCTION system.
YOU RISK LOSING ANYTHING, OR EVERYTHING, YOU HAVE ON YOUR CURRENT XP SYSTEM!!!
DJjay wrote: I am about to install Vista as an upgrade to WinXP.
My question is will it affect the user accounts in any way? Will I and the other family members using the PC be able to log in OK and use all their files etc no problem?
Also, on a similar note, will program installation settings remain OK or will the upgrade require me to reinstall everything?
Jon

Contrary to the other posters, I did an upgrade on my system without any problems. I did not have more than one account on the system but I did not lose anything and was able to still login. As a matter of fact it even retained my wireless network settings and restored mapped drives on the first boot.
"DJjay" wrote in message

I am about to install Vista as an upgrade to WinXP.
My question is will it affect the user accounts in any way? Will I and the other family members using the PC be able to log in OK and use all their files etc no problem?
Also, on a similar note, will program installation settings remain OK or will the upgrade require me to reinstall everything?
Jon