system
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Are you looking at commit size? If so that’s not so far off mine (I also use AIS6). If not, that’s not normal.
http://f.cl.ly/items/2T341A3l1S0j3H3X2A3n/AvastSvc.png
Edit: Looks like you posted you were while I was taking the screenshot 
In that case, yes that is a reasonably normal commit size.
You might want to bear in mind that Commit Size is the potential Pagefile useage (unless you have disabled the pagefile - which would be a bad idea) for a process and is not the amount of physical memory actually being used by a process.
If you did not know that already, you may want to give this a read, click the “Monitor how much CPU and memory resources are being used” link and then read up on what the memory columns actually mean.
For a more detailed description on how it works, you can see this Wikipedia article.
The short answer is, it’s not actually using that much memory.