Either way, have you tried uninstalling, then reinstalling or simply "repairing" the browser"? Make sure to run a good antispyware scan to check for maklware.
Ewido/AVG Antispyware 7.5 Tool
If you haven't done either of the above, it's a good place to start.
Hope this helps.
windows xp home.browser open and closes in split second.can anybody help.