Okay, in my Windows Update, this 'optional' update is forever on there, waiting for me to install it. Well, when I do try to install it, it just ends up failing with error code 80070103 (Unknown error). Is this update necessary for regular use or do I need it, despite it being labeled optional. Oh, and why does it fail continually? 

My Computer
System One
-
- Manufacturer/Model
- HP-Compaq Presario CQ60-215DX Notebook PC
- CPU
- AMD Athlon™ X2 QL-62 Dual-Core Processor
- Memory
- 2GB DDR2
- Graphics card(s)
- nVidia GeForce Go 8200M
- Screen Resolution
- 1366x768 (15.6'' Diagonal)
- Hard Drives
- 250GB SATA hard drive (5400 rpm)