Unfortunately i have uninstalled solid works  uncompletely and now   when i want to install it again ( solid works 2012 ) it wont install and says :

The installed Toolbox folder cannot be found: D:\Solid Works\SolidWorks\.

Make sure you have access to this directory.

SolidWorks installation or upgrade will fail if Toolbox is not present in this folder.

To resolve this issue, repair the existing installation or select a different Toolbox option.

This condition must be resolved before you can continue.

OK  

Note that the installation doesnt have any repair option

Thanx.....