In the above given figure (1), we see that the length of two sides `P' and `Q' when added then. it is less than the length of `R' because it violates the definition of triangle inequalities. A triangle is having equal sides, and the angle that is different to these sides is also same.
To enable Windows Update. Click Start, point to All Programs, and then click Windows Update. Click Change settings. In the Important updates section, select a mode of update that enables Windows Update (any selection other than Never Check for Updates), and then click OK. Click Start, and then click Run.
Now that the Windows Update service has been disabled, you need to go to the following folder and delete all the files and folders inside of it: C:\Windows\SoftwareDistribution\. Once you have deleted everything, go back to the Services dialog and right-click on the Windows Update service and choose Start.