Thanks everyone for the support :)
All this day was for setup my daughter laptop (useless work I know ......). Now it's pretty finished so I hope tomorrow to start the same work with my PC.
No problem at all for backup, I'm used to do copy for all every day with both incremental backup on external hard drives and in dvds too So only a really big problem could let me without my files.
At this moment I'm preparing all the programs I'll need in the new OS and I'm checking if all that I own can run in Seven.
I'm impressed by Seven speed, I don't find many differences from Vista but for sure it's "light".
@ gregrocker : Seven was perfect on this laptop (a tablet PC, HP Pavilion tx2623ca), I only had to install the FingerPrint reader but all went perfect
I'll give you my news tomorrow
Thanks again
Lio