text: what does this mean? once in a while a little box appears with the heading"microsoft visual c++ runtime library"and below that is"runtime error! and r6025 -pure virtual function call.at the bottom of the box is an ok square to click.what does all this mean,is it important or what? well, if your windows is not crashing then it's ok, what that means that some application is crashing(the .dll file that is associated with that program),it could also be some 'invisible' program like adware or spyware... if you search google for error r6025 you'll see that there are many pages with same error in microsoft products..powerpoint, word, access...if you don't see anything crashing then what you can do is go start/run msconfig , go to startup tab, and uncheck the programs that you don't need to use, also check for weird stuff.  good luck