Installation of WLM will not impact OL03. OL03 and OL07 are quite hardy in that regard.
If WLM is made the default email client instead of OL03, you should expect Outlook 03, upon receiving updates via Microsoft
Update(MU) to flip that switch making OL03 default again.
The primary issue with WLM and OL occurs with messages in Outlook. The current version of WLM can not import OL03 messages directly
into WLM. OL03 messages must first be imported into another email client(OE, or in your case Windows Mail) then imported into
"ELW" <ewyatt_del_me_@xxxxxx> wrote in message news:llSAl.5958$x8.3977@xxxxxx
> My Vista Home Premium still has Windows Mail; however, I wish to install the
> newer Windows Live Mail application. Question: is uninstalling Windows Mail
> problematic? Will the uninstallation affect my Office suite, my Outlook
> 2003, or anything else? Note: I ask because I've read that it "may" be a
> problem. Thanks.