(cc-ing dev list)

On 11.02.2010 06:36, Steve Borho wrote (in private email):
> I've been re-reading the upgrade tutorial at:
> 
> http://www.tramontana.co.hu/wix/lesson4.php
[snip]

There is a pretty good chapter in the Windows Installer Help
(as installed by the WiX tools installer), which I just found again:

In the Contents tab navigate to
How To Guides -> Updates -> How To: Implement a Major Upgrade In Your Installer

It's also available online at
http://wix.sourceforge.net/manual-wix3/major_upgrade.htm

Probably the most important advice:

"Step 4: Test upgrade scenarios before you ship version 1"


Today, I tested a bit installing upgrades/downgrades using f757dc6859a5
of thg-winbild on Windows 7 Ultimate 64 bit.

Removal of preinstalled products seems to work.

I intend to do testing on Windows XP 32 bit and Win 7 Ultimate 32 bit
next (all in clean VirtualBox VM instances).

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