I am using P-IV 2.8 GHZ processor and Intel 945 series motherboard.
When I am using DOS application my CPU Usage goes to 100%. There is no virus and no warm in my system.
Please tell me the possible solutions to follow.

Shanmugam,

That's the way true DOS applications work. The DOS application will own the CPU for the duration of its active life.

Shanmugam,

That's the way true DOS applications work. The DOS application will own the the CPU for the duration of its active life.

But I checked with another machine, but it was working normally. For me only it was working very slow.