I am running Vista Ultimate 32 bit. I've been away for a week and switched
my computer on first time after that yesterday. Event viewer is now full of
messages (event Id.1035 source MsiInstaler) appearing between yesterday and
today, indicating the following for almost all my applications (example for
Adobe Reader shown here):

Windows Installer reconfigured the product. Product Name: Adobe Reader
7.0.9. Product Version: 7.0.9. Product Language: 1033. Reconfiguration
success or error status: 0.

Anybody knows what is happening?