Before this I have no solid antivirus program, then after a few weeks, i discovered that i have been infected by some annoying virus but then managed to remove it. Then, i decided to install AVG free as a way to prevent future virus infecting my laptop. But when i installed it, it wont install and gave me a pop-up error message. It says, file system error (65535)

Cant anybody tell me any solution for this problem ASAP. Thank you very much for your time!

Cant anybody tell me any solution for this problem ASAP. Thank you very much for your time!
My Computer
- Computer type
- Laptop
- Computer Manufacturer/Model Number
- HP G42-454TU
- OS
- Windows 7 Ultimate x64
- CPU
- 8.00 GB RAM
- Browser
- Google Chrome