Here is OTL log file.

My computer seems alright now. I don’t see that malicious url alert anymore. Thank you very much for your help.

I just installed AVG only after I had this problem hoping it can solve it. I’ve uninstalled it now.

But I see a problem that I can’t go to control panel to uninstall it. Message box showing ‘Window Explorer has stopped working’ appears whenever I try to enter control panel. I had to use Tuneup to uninstall avg.