Had the same issues as Wordeee, but having uninstalled and trying to reinstall from disc it just keeps asking me if I want to uninstall - no option to try to reinstall the game!
I have even removed Impluse via Add or Remove applications from the Control Panel, downloaded Impulse from their web site and tried to reinstall the game. If it helps, I'm getting a dialog box saying can't find network location NO$KEY.
When installing Impulse from what I downloaded, it's picking up some of the directories I customized (off the disc it's just installing Impulse where it wants, not where I want it to), so I'm assuming the uninstall program isn't cleaning itself up completely.
Really a bad user experince so far. Very disappointed! Any ideas before I ask the person who bought it for me for Christmas to return it?
Update:
The uninstall wasn't clean, so on my XP SP3 system, I opened up the registry and deleted the following entry:
HKEY_CLASSES_ROOT\Installer\Products\7A6E627C31C68BF449D3C8FD7E41D064
that allowed me to reinstall the from the CD. complete the install and did not start the game up at completion.
The version of Impule I downloaded from the web, and installed previously, recognised the install game and propmted me to get the v1.1 update.
Unfortunatley I'm still getting the 'Error: Download verification check failed' message. So I've spent a couple of hours getting back to where I was before I tried to update to v1.1, with the exceptioon I have Impluse installed where I want it, not what it thinks I want.