system
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Hi Guys!!
Thanks for the prompt reply. I have installed the WinASO Registry Optimizer and run a scan, it is actually due to the registry conflicts that causes this problem. Hmm, you guys are right, it is not causing any conflicts. In fact, it is really a good security combination(COMODO & TS) and nevertheless plus Avast. This 3 freeware is really a must to have for those who relies on freewares. 
Cya guys!!!