Hi, I have Norton Antivirus installed on my laptop (Centrino duo and 2Gb RAM) and I noticed that when i installed it my laptop got really slow, takes ages to do anything. Is the Norton what is causing this? Should I get rid of it and get another antivirus? Which one?

Working quickly and quietly in the background, Norton AntiVirus requires little memory and system resources. The new Norton Insight relies on extensive online intelligence to target only those processes at risk, resulting in faster, shorter, fewer scans. And the new Norton Protection System employs a multilayered set of security technologies that work in concert to detect, identify, and block attacks. Version 2009 improves on product performance.
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Norton AntiVirus, developed and distributed by Symantec Corporation, provides malware prevention and removal during a subscription period. It uses signatures and heuristics to identify viruses. Other features include e-mail spam filtering and phishing protection.

Symantec distributes the product as a download, a box copy, or OEM software. Norton AntiVirus and Norton Internet Security, a related product, held a 61% antivirus market share as of 2007. Major competitors in terms of market share include antivir