change font type VB hang

I need help on below issue.

Currently I face a problem on VB. When I need to change a font type for form/label/text/...on design mode, the VB6.exe will perform hang (more then 99% of CPU processing time). Why?

I try to remove and install VB6 again but when start to use it, first time ok, second time will start to hang.

This problem come only two days ago, before this is fine at all.

I'm using Win XP OS.

Once again..change font type then VB hang.

Thanks.