Because you're upgrading from pre-release software. Anything could go wrong due to minor changes.
How to Upgrade the Windows 7 RC to RTM (Final Release)
- Thread starter Spooter
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Soldato
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Just done a clean install of Windows 7 Ultimate this afternoon, just a case of getting everything back to the way i like it 
HOw different can it be?
I have spent the last 4 weeks getting it the way I like it.
Clean installs are great. But they are extremely time consuming when you take iinto account re-installing all the software and hardware, and that doesn't even take into account all the tweaks you have done down the line.
I can't see any problem with an upgrade.
Sure. Back up the drive first. But in reality a clean install is nuking the drive anyway. So, even if an upgrade did screw up. I fail to see how you are any worse off?
You would then simply do the clean install. It would simply have taken 1 hour longer.
Of course, if an upgrade works fine (which I suspect it would) then you save yourself a month of tweaking.
I have spent the last 4 weeks getting it the way I like it.
Clean installs are great. But they are extremely time consuming when you take iinto account re-installing all the software and hardware, and that doesn't even take into account all the tweaks you have done down the line.
I can't see any problem with an upgrade.
Sure. Back up the drive first. But in reality a clean install is nuking the drive anyway. So, even if an upgrade did screw up. I fail to see how you are any worse off?
You would then simply do the clean install. It would simply have taken 1 hour longer.
Of course, if an upgrade works fine (which I suspect it would) then you save yourself a month of tweaking.
The problem with an upgrade install is that the problems can only surface at a later date. Things may be fine initially, but the potential is far greater for issues to arise later on. Doesn't seem worth the risk to me personally.
very. although microsoft do their best when testing their software upgrades
p) they simply cannot account for all the funky software/hardware/driver combinations people have. you might get lucky and it'll work for you. i prefer the safe no doubt option.besides, i'm up and running from a clean install within a couple of hours, not a month.
i don't have many heavy duty applications on my machine. a lot of programs i run are portable apps that store their own settings within their program folder. i store these on another partition and run them from there. and stuff like my firefox profile is backed up so i just copy across a folder and i'm back up and running with everything how i left it within seconds. i also have all my games installed on another partition and they don't need re-installing either.