My computer was working fine until I downloaded the windows service pack 1. First it was every now & then but soon my computer was freezing up ( not responding ) and it was impossible to even complete a document. This happens in all applications. I noticed with each new window update the worse my computer got. Still under warranty I spent hours on the phone with DELL twice, finally I did a fresh re-install of windows 7 professional.
After the fresh install everything was fine. UNTIL I downloaded the windows updates, it started to 'not respond' again.
I uninstalled the updates. The not responding issue is gone but I am concerned about windows security updates. Do I need them? I have contacted windows about this issue many times over the past several months with no response. Is anyone else having this problem. what should I do?

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