I can see where the Hosts File link is confusing,so just read through it a few times and if you still dont understand it,just skip it!
To Disable System Restore-> Click Start-> Right Click My Computer-> Select Properties-> Click the System Restore tab and place a check by Turn off System Restore!
Restart the PC-> Go back to System Restore and Uncheck the box!
This flushes all the old nasty restore points out and created a nice new clean one!
Once you have done that,the PC is good to go!
Read through those 3 little black links in my signature,they have some interesting info in them!