I Have To Reinstall All My Software If I Upgrade To Windows 7, Right?

I’m on the fence with installing the Windows 7 beta, and I’m just making sure that I’m going to be prepared if I do decide.
So I would have to reinstall all of my software, correct?
(PS: If anyone is using it, a recommendation of whether I should install it would be appreciated )

How To Upgrade Windows Xp To Windows 7?

well basically i know how to upgrade PC. . i just wanted to know what are the requirements for upgrading my DELL PC windowsXP software to windows 7. .
i have my DELL pc for four years. . its system got windowsXP professional version 2002 SP2
pentium 4 CPU 2. 80ghz
2. 79ghz, 1gb of ram
can i [...]

I have to reinstall all my software if the upgrade to Windows 7, huh?

I'm on the fence with installing the beta version of Windows 7, and I'm sure what I'll be ready if I decide.
  So I would have to reinstall all the software, right?
  (PS: If anyone is using it, a recommendation of whether I install it would be appreciated: D)

Will I have to reinstall all my software if the upgrade to Windows 7?

I am also worried some of my data was lost in the transition, do I need to back up everything?