In one embodiment, a trickle and repair application receives data from a sending computer system and trickles the data to a target computer system over an in-band communication channel. The received data is evaluated for the presence of malicious code. When malicious code is detected in the data, trickling of the data is terminated. If the infected data is repairable, the data is repaired and an out-of-band target data notification is generated and sent to the target computer system. In one embodiment, receipt of the out-of-band target data notification causes the target computer system to flush the current buffer and any local files containing the trickled data. The target computer system returns an out-of-band target acknowledgement to the trickle and repair application and the repaired data is sent to the target computer system.