Hi, I need advice on which antivirus,antispyware,firewall etc to use. I have downloaded quite a few but I am not satisfied with them primarily because they slow down the pc. I used Norton,Macfee,Bullguard,Avast,Solo, and AVG. i found only AVG doesnt slow down the pc. For Antispyware,I used spyware doctor(very good for security but slows down the pc),spyeraser,spysubtract. Currently, i am using threatfire. I am using the windows firewall. I need advice on which antivirus,antispyware and firewall are good both in terms of security as well as doesnt slow down the pc. Are Internet security (all in one) good enough, or seperate pakages are better? I will appreciate advice very much. PS:I would like to repeat that NOT slowing the pc is very important criteria for me, as I use loads of engineering softwares.