Those are transmission errors, whereby the checksum or error correcting code of a transmission failed (packet was damaged) and thus the data had to be discarded and another copy requested (or waited for). 264 aint bad in over 200 MB of data at 7.6 Mbps, especially if the cables your service comes through are copper.
If you are using a wirless connection, attempt to change the channel the service uses or move the transmitter closer to your device. Ultimatly errors are impossible to stop, although they can be made near improbible.