Does the blaster worm effect outlook running off an exchange server? I had a client infected with it. He first noticed that outlook would hose up all the time....he couldn't move messages...he would click on contacts or other folders stored in his personal folders and outlook would just freeze. I cleaned the system of the virus however, his outlook problems have not gone away. I loaded the pst on another outlook computer and he can navigate through the folders just fine. Definitely a local issue. Also another client that was infected is having slowness problems in outlook (both are outlook 2000)