We've just installed a clean copy of Stardraw AV Lite 2007 onto a clean Vista 64 machine and unfortunately, we are not seeing any problems.Can you try the following:
1. Uninstall Stardraw AV Lite 2007 on your machine
2. Delete any left-over files from where you installed the software - usually C:\Program Files (x86)\Stardraw.com Ltd\Stardraw AV Lite 2007
3. Make sure you have all the latest windows updates installed for Vista 64 bit
4. Download and install a fresh installation program from: http://www.stardraw.com/downloads/2007/setup%20stardraw%20av%20lite%202007.exe
If this still fails to install for you, then please send an email to techsupport at stardraw dot com and we will arrange for someone to call you and try to diagnose your problem remotely.