windows-XP home with sp2 original to Windows XP pro with sp1 o

[vasulic]

I have windows-XP home with sp2 original now i want to upgrade to Windows XP pro with sp1 original.If i upgrade will i lose my datas?. will i have to format my HDD again?

[New]

I think no need to format the HDD to upgrade from home to pro..So if you are just upgrading from home to pro you won't lose datas.