Do Apps slow down my Android phone?

alexir

New member
I installed a task killer on my HTC Desire and every time I open it there are loads of apps that seem to running that I installed but haven't used for a few days eg the Vonage or Gesture Search apps. Why/how do these apps open by themselves and do they slow the rest of my phone down by opening like this? I kill all apps several times a day but they open right back up again
 
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