The new unified installer for all Windows Live tools doesn’t work on Vista x64. But that doesn’t mean they don’t work.
Just get the individual MSI from great WL contributor Scott:
- Windows Live Writer: Install_{1F973A7F-3FE4-4D11-A9A2-E869C2899A7D}.msi
- Windows Live Messenger: Install_{508CE775-4BA4-4748-82DF-FE28DA9F03B0}.msi
- Windows Live Sign-In Assistant: Install_{CB5EA99C-8A5B-49F2-9A1A-2EF78BE4DB41}.msi
- Windows Live Mail: Install_{EDB619FD-4E71-403C-8E99-DFC9CF9DD345}.msi
- Windows Live Toolbar: Install_{C6876FE6-A314-4628-B0D7-F3EE5E35C4B4}.msi
- Windows Live Photo Gallery: Install_{AA436FBD-2595-479B-8DDE-E9C36F50D99D}.msi
I’m using both Live Mail and Live Writer without a glitch 
