actually 360 is supposed to be faster than many of the others.
360 is the current darling of most of the mags and security specialists - What spec is your PC? - a low spec PC will see a heck of a speed decrease whatever you run
If I'd just bought 360 I'd be more than a little pi**ed at being told to go for a free download (just me eth ... call me wierd - but I would!)
and see what the free version misses out on
http://free.grisoft.com/doc/download-free-anti -virus/us/frt/0
The difference between free AVG and 360 is 360 gives real time protection while AVG finds the problem only when you remember to run a scan - and assuming that you are considerate enough only to be infected with the only type of threat AVG can deal with (by which time all you password and bank details will already be safely in Ivan's databases!!)
which is why there is a slight slowdown ... all realtime scanners do this
(people tend to ignore schedules and switch off). That's why it's free! (it's a hook for the paid version
the freebies are fine ... if you stick to the BBC website and don't buy or bank online ... or just won't buy (something is better than nothing)
anywhere else ... and it's time to consider what else you have on your machine.
If you've already shelled out ...
start with the pc spec.... then consider which options you actually need .... no kids ... turn off parental control...
no e-mail ... switch off the filter /// online e-mail turn off the spam filter .....