Run the task manager and see if your CPU or ram is the problem and then upgrade accordingly.

You might want to check your windows device manager and make sure that the driver can't be updates by windows simply from there.

You should try installing the latest drivers for your wireless adapter.

You could build a monster of a gaming pc.....or even buy one online.

Building it would ensure you could play steam games for years to come.

Programs won't increase the value much, unless the person doesn't know about torrenting, but the set up you won't get more than $150 i would say

I just wipe my drive every six or so months, that way it gets back to tip top shape and I havent had to worry about a virus for at least a few years

Primary Drive 0 Not Found error, this could mean several things:
1) The cables are not properly connected to the hard drive (or motherboard).
2) The hard drive is in a bad condition and needs to be ...

Do you have the most up to date drivers for the wireless adapter?

Have you tried reinstalling them?

(http://www.asus.com/Notebooks_Ultrabooks/N56VZ/#support_Download_30)