I written a bat file which copy dll files from C:\Temp to windows system 32 folder. Used runas to execute the batch program. In XP, able to copy without problems but in Windows 7 , got error access denied thought the id used in the runas command has the administrator previlege. copy.bat : Copy C:\\Temp\\jniwrap.dll C:\\Windows\\System 32 runas /profile /user:domain:userId Copy.bat The command asked for the password also and accepted the password as well. domain: the network domain userId: the logged in user id on computer has administartor rights.

You should enter in safe mode and copy that dll.