Hi Computer Maker,
Welcome to the Bleeping Computer HijackThis forum.
I have two questions.
First, are you using an ISP based in Bangladesh? Specifically, Dekko Airnet Ltd. I see in your profile that you are in India. If you are using this Bangladesh ISP then the O17 line in your log is legitimate.
Next question. Do you know what this program is, and did you install it deliberately:C:\Program Files\Ananda Computers\Bijoy 2003 Pro\Bijoy.exe
Those are the only questionable things I see in this log. If those items are legitimate, your log is clean.
Please let me know.