Dell Inspiron M5040

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Basic, Service Pack 1, 64 bit
Processor: AMD E-450 APU with Radeon(tm) HD Graphics, AMD64 Family 20 Model 2 Stepping 0
Processor Count: 2
RAM: 1644 Mb
Graphics Card: AMD Radeon HD 6320 Graphics, 384 Mb
Hard Drives: C: Total - 290143 MB, Free - 242166 MB;
Motherboard: Dell Inc., 0RXDMJ
Antivirus: AVG AntiVirus Free Edition 2013, Updated and Enabled

Hard Drive WDC WD32 00BPVT-75ZESTO SATA Disk Device

Targeted Read Test Failed Error code WHD20-BOQ

SMART Short self test Failed Error code WHD16-EUO

How can I fix this problem

Regards