NAV2012 Silently Eat Up my HDD space..??

After months there's no solution given in the thread below

http://community.norton.com/t5/Norton-Internet-Security-Norton/HIGH-HDD-I-O-and-no-option-to-DISABLE-Idle-Time-Scan-in-NAV2012/m-p/621379#M188225

 

I've encountered another problem with Norton AntiVirus 2012, expecting the 2012 version will be the best I ever used but days after days became worst, here's the new problem...

 

Since last week I noticed my HDD free space got eaten almost 1 GB without any reason and there's no program installation or anything else.. After I checked with portable software WinDirStats, I discovered that old version folder of NAV2012 take almost 1 GB...

 

What is inside that folder?? And I'm asking.. CAN I DELETE THOSE..?? Or using Norton Removal Tool and delete all Norton related folder to free up my drive space and re-install Norton AntiVirus 2012..??

 

Waiting solutions...

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Here's the screenshot (using WinDirStats)

 

2012-01-06_113017.jpg