When i try to install the update package(Sitecore 8.1 rev. 151003.update) in the installation wizard,all the items get processed but get stuck up in the last step (copying files).Hence the installation is not getting completed.
When i see the post installation error file (\temp__UpgradeHistory\Upgrade_Sitecore 8.1 rev. 151003_20170318T05502164),there are lot of errors saying "Access to the path is denied."
I have provided the full access to files in the IIS for IUSR user.
Please help me in resolving this issue