If I already install Norton Antivirus 2010 and want to uninstall it and reinstall it again?

Yes you can install it on the same pc again and again. When you update, your pc is recognised.Remember to copy the registration key before uninstalling

I would use the removal tool, after using add/remove programs to make sure all remnants are gone,

http://service1.symantec.com/Support/tsgeninfo.nsf...

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hey, at the beginning you need to uninstall Norton internet protection.... STEPS ARE :- one million. visit start, click All courses->Norton internet protection->Uninstall Norton internet protection. 2. Then, Uninstall Wizard looks. There are 2 innovations you could elect. 3. the 1st one, Norton custom Uninstall, it rather is uncompelety uninstall, meaning you could shield some settings(including Norton AntiSpam). 4. the 2d, Norton Compete Uninstall, it ability you will thoroughly uninstall Norton internet protection. 5. click Norton Compete Uninstall, the Wizard will seek for suggestion from you the justifications for uninstall. you could choose for deliver the message, then click next to start uninstall. 6. The programme start to uninstall, you will be able to desire to attend some seconds. 7. finally, you will be able to desire to restart your equipment to end Norton internet protection uninstallation. you could now deploy Norton Antivirus 2010 ........................ each and every of the final, Alexa

you won't be able to reinstall it again without paying the charge for multiple re-installation, and that's to prevent illegal use of the same product key.