Hi akpraveen, and welcome to the VMware Communities!
Does your laptop have Avast! antivirus installed? We've seen quite a few reports lately of Avast! causing the failure you are seeing there. If you have Avast! installed, you will need to uninstall it temporarily to be able to install VMware Workstation (disabling Avast! is not sufficient).
If you're using some other antivirus or antimalware system, it might also be worth trying to disable it while installing VMware Workstation.
Let us know if that solves the problem for you!
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Darius