-Removed-Then you probably don't need any serious protection. If you'd like to test your speeds, go to www.speedtest.net
Run one test with Bitdefender on, and one test with it disabled.
Also, you should seriously consider switching to Firefox or Opera. Internet Explorer is full of security holes. I can't stress that enough.
http://www.theinquirer.net/inquirer/news/1562900/microsoft-denies-windows-door
Microsoft denies that Windows 7 has a back door
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Since no one outside Microsoft except a few secretive government agencies and very large corporate customers can review its Windows 7 source code, most people simply have to take the Vole's word that there are no intentionally built-in security holes in it.
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-Removed-After getting FireFox (seriously, just do it), transfer over to Gmail. You WILL thank me.
You can import from Yahoo!, Hotmail, AOL, or other webmail or POP3 accounts.
I run all my mail through Gmail now.
Don't open dodgy programs that you got from sites other than sourceforge, CNET and other reputable sources. If you really have to try software, download sandboxie - you can install and run programs in a 'sandbox' meaning the software doesn't leave a trace after you close your sandbox session. http://www.sandboxie.com/
Don't visit any porn or 'warez-type' sites. Ever.
Don't download movies from peer-to-peer networks, and if you really MUST have the newest Transformers movie, don't use Media Player, get VLC.
You actually don't need too much protection, like hoppy said, if you use web based mail.
Most of the free AV and malware software should keep you protected.
I wrap sellotape and tinfoil around my PS2 and USB connections. This stops any extra terrastrial bourne viruses get in. I read this on useyourcommondogfuk.com
When I shut down at night I have to wrap the monitor in cling film. A laborious task but it seems to work.
I wish you all luck in the fight against evil data nibbles!