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Application lock up
means it doesnt respond to key presses or mouse commands and its
not doing anything but you cant close it the regular way. You
can close it by clicking End Task in Windows Task Manager and continue
to work. The system is able to eject the application where it whether
it likes that or not. . This is possible only in operating systems where
no user application is a boss of the CPU. Preemptive multitasking
doesnt let an application to be a boss of the CPU, the system
is a boss. So if in Windows 3.x a single applications lock up it locks
up the whole system. In Windows 9x this doesnt have to be the
case. In NT family, it takes much more then that for an application
to lock up the system, NT is a real boss. Frequent application lock
up of some particular application is an inside problem and only manufacturer
of the application can help you.
Figure 316: Using End Program to Kill a Locked-Up Application
Windows NT family and 16-bit applications
On Windows NT family you may experience that when one 16-bit application stops responding, all others 16-bit stop as well. If you dont want this to happen start 16-bit applications in separate memory space. You do this by either /separate switch with start command, or making and configuring a shortcut.
System lock up is more
serious version of this problem as everything freezes and
you definitely have to restart your system. But dont hurry, a
very busy system is responding slowly to your input it may look at some
point like a system lock up. If you hear a hard disk being busy for
example give the system some time before you react in any way. My way
of detecting a system lock up is pressing Caps Lock or Num
Lock on the keyboard to see if the keyboard LED can react. If LEDs
do not hang even after couple of seconds it is a lock up for sure.
Of course, it might be just a keyboard problem, but you got the whole
idea, move your mouse and press keyboard.
Okay, this what a lock up is but
why is this nasty thing happening and what can you do? This should not
happen, or should happen extremely rare. If it happens more then extremely
rarely, it is an indication of a serious problem.
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