Hi
New driver update available for your computer for Intel(R) PRO/100 VE Network Connection:
http://downloadcenter.intel.com/Product_Filter.aspx?ProductID=60==
My guess for the culprit of the slowdown is Spyware Terminator. The fact that it is a former rogue software is one part of the issue, the other is the framework it is built on.
The framework of the program is built to handle resources and memory in a more heavy format, which makes it difficult to run another realtime protection program at the same time. If you want to boost the speed of your computer, either remove Spyware Terminator or disable its realtime protection.
Whenever I had Spyware Terminator in the past, the program was strong and it had a good database of known spyware. It seemed to have slowed my computer down by 5% and reduced my network speed by 30%. I had an antivirus realtime protection on alongside it.
Let me know what you do.