Single click works as a double click

[Champak]

This is a problem for me. I single click a folder & gets double clicked & open. Dont know why it is happening. When i right click the folder & then rename or click any option then it automatically gets unselected. Can anybody help me?

[Ekavir]

Go control panel --> mouse --> double click speed with slider. Now change the double click speed.

[Champak]

Hey thanks it worked!
But why this speed got changed initially. I never changed it from default.

[Conrad]

Check this out!
Mouse single click acts like double click