I have a HP 2140 Mini Net book, I cleaned over 15 GB of Junk files (Pictures, Movies, Music from it) and another 5-20+ GB of Spyware, Malware and viruses from the Hard drive.
I've upgraded it from the 1GB memory to a Maximum 2 GB. I got the promised 7 hours of battery time out of it one time, but for what ever reason the battery Icon doesn't indicate more than a max of 4 hours any more. I wonder if that there might be some sort of spyware or something that might still be running in the background.
However every test that I have done, Scan for malware, scan for viruses, netstat and other methods of watching the traffic on it all come back negative.
If it Helps to assess what is going on, I am running Windows 7 ultimate and MS Security Essentials. I even went out and had the battery tested, came back with the battery is just fine.
Am I being paranoid or is there something else I should check?