Hello ah_wei and welcome to the BC HijackThis forum. I don't see any signs of viruses or malware in the log. It is clean.
It appears that there are multiple anti-virus applications running on this computer (Kapersky and AVG). Running more than 1 anti-virus application at the same time can cause file access and resource issues and if there is an infection the multiple programs can actually block each other from dealing with the infected file(s). I highly recommend that you choose which application you want to keep and uninstall the other one(s) to prevent these problems.
The HijackThis forum deals exclusively with virus and malware issues. HijackThis does not have the capability to analyze performance, hardware or application issues. For these types of issues I would suggest posting to the Windows XP Home and Professional
The techs in that forum specialize in matters pertaining to the operating system, performance and applications. Let them know that you have been to this forum and that no malware was found.
When posting to any other forum, do not post a HijackThis log or the post will simply be moved back to this forum for infection analysis. That is what HijackThis is used for and that is what we specialize in here in this forum.
Also, when posting in any other forum for assistance, give as much detail as possible regarding any issues that are occurring. The more information they have, the better the techs can analyze the issue and make any recommendations for resolving it.