I am running Windows XP Home with SP2. ZoneAlarm Firewall & Antispyware, AVG Antispyware and Avast antivirus. Previous version of SB worked fine, updated to v4 and it works fine except I get the following error message when SB tries to automatically update when I first logon to a limited profile or when I try to update manually from a limited profile. ERROR DOWNLOADING FILE Cannot write file to disk Error 75: Path/file access error. There is no problem when updating from a profile with administrator status. I have tried altering the permissions in the registry but without any effect. Any ideas?