I am using Zone Alarm Internet Security Suite version 8.0.400.020, and it is interfering with iTunes (version 8.2.16). When ZA is active (i.e. started), I cannot sync or restore my iPhone (error "Disk cannot be written to").
However, setting ZA not to load on startup and having it off gives me no problems at all.
All iTunes-related processes have been granted Super Trust level in Program Control, yet there are still problems.
As of now, the only way I can succesfully sync my iPhone is by deactivating ZA, restarting my computer. This is time consuming and unsafe, as my PC is exposed to threats during that time. I am using the 32-bit version of Vista Business.