This problem just began occuring last night - I'm not sure what prompted it. I've looked through the forums and found similar problems, but nothing that provides a viable solution for me. I've tried deleting the .tmp files that are being generated and scanned, but for some reason, I'm being told that I don't have permission to do so (I'm on Vista Home Premium 32 bit as Admin). I've also tried excluding the Quarantine folder, but Auto-Protect is still generating and scanning the .tmp files.
If anyone can point me towards a fix for this problem, I'd be grateful. I'm running Symantec AntiVirus 10.2.0.276 - if you need any additional information, please let me know.