Pretty sure I understand what this anon wants. But the thing is, what kind of windows that pops up? Is it a script? Is it a warning? Or just some random windows that who-the-hell-knows-what-it is? Or maybe a windows of unknown program? Or even internet browsers? Could it be virus?
We don't know for sure. It depends on what kind of windows that suddenly appears on your screen.
It could be a warning, a script, a virus, advertisement, a program/software or an incomplete installed program/software (you know, when you in the middle of installing and then something happened, with little of this and little of that, the installation completed. Then when you open the program, it didn't run or maybe it did but your computer stopped responding) or some other problem that I haven't stated here.
But whatever it is, all we want is to get rid of that annoying windows/unwanted software or whatever you called it.
You can stop the program from running again using taskmanager.
*make sure you know what is the name of the program that you want to kill.
If it doesn't work, go to msconfig.
*make sure you know what is the name of the program that you want to terminate.
So far I have been doing these steps to solve this kind of problem. I bet with only taskmanager will solve the problem. But this only applies if the program/software listed in the taskmanager.
Hope this helps you.
p/s: I don't know if I quote the title right. But well...