SIW2

It's always good to see another free option.

It downloads a ton of stuff on first upadate - I reckon 140mb or more, dmex reckons more like 200mb.

So it's certainly not small.

I am currently Using Avast - 1mb at idle - less than MSE.

Still, a couple of mb of memory is inconsequential.

Another thing thet may, or may not bother you - it checks ( and I think , keeps checking) you have a valid version of Windows.

It also sends info back to MS ( anonymous they say).

As your Windows install does that anyway - you may feel that's a bit too big brother ( George Orwell - not the tv show).