About as safe as any data can be that is not backed up.
Don't you regularly back up your data? Installing SP3 on C drive will not
affect D drive data.
How to obtain the latest Windows XP service pack
http://support.microsoft.com/kb/322389
Release notes for Windows XP Service Pack 3
http://support.microsoft.com/kb/936929
The hard disk space requirements for Windows XP Service Pack 3
http://support.microsoft.com/kb/947311
Steps to take before you install Windows XP Service Pack 3
http://support.microsoft.com/kb/950717
List of fixes that are included in Windows XP Service Pack 3
http://support.microsoft.com/kb/946480
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TaurArian [MVP] 2005-2009
Update Services
http://taurarian.mvps.org
"Miklos" wrote:
> I keep all data on a second drive D: .
> Should I need to backup before installing SP3?
> And will XP work normally after the upgrade ? [I have only XP on my C: drive]