My CPU Usage reaches 100 when i open dos applications in windows XP. The fan
Moves rapidly and the whole computer produces sound. Can anybody tell how to
reduce the CPU Usage while opening DOS PRograms in Windows XP? It also reaches
100 Percent when i open OPENGL games and DirectX Games.
Press Ctrl+Alt+Del and check witch application is doing this 100% CPU usage ... maybe it's something with drivers.
For example sometime with Creative sound card drivers there is 100% CPU usage by CTHELPER.
Hey, I had that problem once. Turned out my video card drivers were way out of date. Check with your Video card maker for new drivers and look in there help section while you are there.
Looking in the task list which b4r4t mentioned is a great idea. Google the offending processes is a good way to go.
Lastly scan for viruses and malware. I do not know how many times I have been called to fix strange problems on a computer and scanning fixed it!
it may be a virus... jus check from taskmamager which program is utilizing the CPU (most)
Several ways to fix this.
1. If you have an old processor (Pentium III or AMD Equivalent) or lower you may want to consider an upgrade, because some programs will tax those CPUs to the maximum. XP, however, will not.
2. If you have a fairly new processor, there is a program that is likely using way too much memory. Lower the process priority using Task Manager, and the usage should decrease. Failing that, terminate the process. If you receive an "Access is Denied Error" disable your firewall or antivirus program. There's a good chance ZoneAlarm is taxing your CPU - did that to me. It could also be a virus, in which case use an antivirus program like AVG (Avira AntiVir Free) to clean the system
3. If you have a program that you cannot identify, but seems essential, or several programs that seem essential: Install ProcessTamer. This is a program that automatically manages process priorities for you and keeps programs under the wraps. However, this is a quick fix, and isn't recommended simply because those programs may stop running if they aren't given enough processing time.
what are your specs for the pc?
is it continusely 100% ?... if it is constantly being in 100% then you should check this. otherwise you can ignore it..
NOTE: stop calling it DOS because there is no DOS in winXP
it's a CMD Shell
I think DOS Box is what you needed. You can increase or decrease it's CPU usage by yourself. It is totally free and ready to be downloaded!