yeti is right about explorer.exe not being Internet Explorer. explorer.exe is the program used to browse folders and files on your system. Internet Explorer will show up as iexplore.exe if it is the one having problems. While you can’t remove Internet Explorer, if you have XP SP1a or better you can run “Set Program Access and Defaults” to hide Internet Explorer. It’ll still be around for things like Windows Update though.
If just opening My Computer is a problem, that’s pretty serious. Something on your computer is really not happy. Bringing up My Computer displays any drives on your system, so it has to go poking around your drives to gather some information, so it could be a driver problem or something not formatted right on one of the drives. It’s hard to know exactly what is wrong though, and since your computer is in Chinese it’ll be even tougher. But here is what I would suggest:
Run a thorough scan with at least two up to date spyware/adware programs. I would suggest the latest versions of Ad-Aware and Spybot Search & Destroy. Also run the Immunize function is Spybot Search & Destroy to prevent future infestations. You want to run at least two because there tends to be some differences is what different programs can detect.
Run a thorough scan with an up to date anti-virus product. AVG is getting rid of their free version, so you’re gonna have to pay for this. I use the commercial version of AVG and it is reasonably priced compared to others.
Run Windows Update and install any critical patches and any device driver updates.
If you remember when you started having problems and have System Restore enabled, run Start/All Programs/Accessories/System Tools/System Restore and have it roll back the install the the checkpoint prior to problems occurring. In the future, if anything hinky happens with your comptuer, rolling back a day or too with System Restore can often fix the problem.
If you are still having problems, do a Windows XP Repair Install. This will replace system drivers and OS files but will not harm your programs, files or personal settings. You will need to read that link very carefully before you do it, because there’s a few other repair or install options that are incorrect. Follow the procedure exactly!
After a Repair Install you will need to run Windows Update again, as your system will have reverted back to the original versions from your CD. Also you may need to reinstall some third-party drivers if you have any devices that don’t have a driver included in XP.