If your system is running slowly and you are concerned if it is connecting to some web sites the tip from Digital Inspiration will be very useful to you:
1. Type cmd in your Windows Run box.
2. Type “netstat -b 5 > activity.txt” and press enter. After say 2 minutes, press Ctrl+C.
3. Type “activity.txt” on the command line to open the log file in notepad (or your default text editor)
Then you will see all connections made from your computer to other servers.
TIP: When running the command better close you web browser and other programs connecting to internet known to you. Wait around a minute and start the test. This will reduce your false positives.