First of all norton takes up too much space and time for scans, so i would recommend you to follow these steps.
Try this it works fabulously
Follow these steps to a completely secure computer. Download and install all of these free programs. It’s allright to have more than one anti-spyware, but not anti-virus so make sure you have removed and uninstalled every bit of your old antivirus and firewall as these can cause unwanted conflicts.
AVG Anti-Virus- http://free.grisoft.com/
AVG Anti-Spyware- http://free.grisoft.com/doc/download-free-anti-spyware/us/frt/0
AVG Anti-Rootkit- http://free.grisoft.com/doc/download-free-anti-rootkit/us/frt/0
Spybot Search&Destroy- http://spybot.com/en/mirrors/index.html
AdAware Personal SE- http://www.download.com/Ad-Aware-2007-Free/3000-8022_4-10045910.html?part=dl-ad-aware&subj=dl&tag=top5
A-Squared Free Edition- http://www.emsisoft.com/en/software/download/
Comodo Firewall- http://www.comodo.com/products/free_products.html
CLEAN UP PROGRAMS
Advanced WindowsCare Personal- http://www.download.com/Advanced-WindowsCare-Personal/3000-2086-10407614.html?part=dl-AdvancedW&subj=dl&tag=button
IObit SmartDefrag- http://www.majorgeeks.com/downloadget.php?id=5318&file=10&evp=3907499a9d91d6d4d70477dfa7628159
Eusing Free Registry Cleaner- http://eusing.com/Download.htm
Registry Distiller- http://www.codeode.com/registrydistiller/index.html
TweakNow Regcleaner Standard- http://www.tweaknow.com/RegCleaner.html
Windows Defender- http://www.microsoft.com/downloads/thankyou.aspx?familyId=435bfce7-da2b-4a6a-afa4-f7f14e605a0d&displayLang=en&hash=EG3dznS7Jd5E9zvCt5ZNZ8nCI7fLawkDMjbsNZAtEWq6G2XsdafpULYMEVfq4BrRNxxc3CvnKhDaOTFrApuKyQ%3d%3d
Now restart your computer twice to ensure all or most of the programs have been properly installed. Make sure to update all these programs everyday. Now that you have updated all your programs go turn off your computer. Now hold on F8 right after you turn on your computer and that will bring you to the menu to go to safe mode. Hit safe mode and log in. Now launch up all the AVG programs and wait about 2 hours as it’s the first scan. If the programs have found anything simply delete the infections. After that, run spybot, adaware, and a-squared free edition, if they detect anything, simply delete those infections too. Then, after those run a full scan on windows defender it shouldn’t find anything by now and if it hasn’t then your computer has been cleaned of bad infections. Now its time to clean up. Run each of the clean up programs one by one. Now you have a safe, healthy, clean computer. And try to download these top internet browsers.
1.) Saffari- http://www.apple.com/safari/download/...
2.) Mozilla- http://www.mozilla.com/en-US/
3.) Opera- http://www.opera.com/