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A terminate-and-stay-resident program (commonly TSR) is a computer program running under DOS that uses a system call to return control to DOS as though it has finished, but remains in computer memory so it can be reactivated later. [1] This technique partially overcame DOS's limitation of executing only one program, or task, at a time.
This allows DOS-extended programs to run either in a multitasking OS that provides its own DPMI kernel, or directly under bare-metal DOS, in which case DOS extender uses its own DPMI kernel. Windows 3.x and 9x's user-mode kernels are built with a DOS extender, so they fully rely on a DPMI API that is provided by Windows's ring-0 kernel.
Not being a DOS extender by itself, DPMS is a minimal set of extended DOS memory management services to allow slightly modified DOS resident system extensions such as device drivers or terminate-and-stay-resident programs (TSRs) (as so called DPMS clients) to relocate themselves into extended memory and run in 16-bit or 32-bit protected mode ...
1. On the Windows taskbar, next to the clock, right-click the ZoneAlarm icon, and then click Shutdown ZoneAlarm. Note: If you don't see the icon next to the clock, click the arrow next to the clock to reveal the hidden icons. 2. Click Yes. Using the Programs menu 1. Click Start, select All Programs or Programs, select ZoneAlarm, and then click ...
To enable virus protection 1. On the Windows taskbar, next to the clock, double-click the McAfee ( M) icon. Note: If you are using Windows 7 and don't see the McAfee icon next to the clock, click the arrow next to the clock to reveal hidden icons. Please know that you can customize your Windows 7 System Tray.
In computing, protected mode, also called protected virtual address mode, [1] is an operational mode of x86-compatible central processing units (CPUs). It allows system software to use features such as segmentation, virtual memory, paging and safe multi-tasking designed to increase an operating system's control over application software.
1. In the Windows taskbar, next to the clock, right click the (M) icon, and then click Open SecurityCenter. 2. In the McAfee window, click Fix. By doing this McAfee will identify the issue and try to fix it.
A DOS extender is a program that "extends" DOS so that programs running in protected mode can transparently interface with the underlying DOS API.This was necessary because many of the functions provided by DOS require 16-bit segment and offset addresses pointing to memory locations within the first 640 kilobytes of memory.