open cmd-->ping target machine ip
go to network chose target machine -->type uid,pwd
click on remember me
note==>
on target machine-->
go to
Control Panel\All Control Panel Items\Network and Sharing Center\Advanced sharing settings
password protected sharing-->turn on
create a user with password
select a folder to share -->right click-->properties-->
click on sharing-->click on advanced sharing-->
check on share this folder-->click on permission-->
click on add-->click on advanced-->click on find now-->
select user-->click on ok-->click on ok-->check on full control-->
click on ok-->click on ok-->click on close.
For sharepoint.sandbox.dll
start-run-> %windir%\assembly\GAC_64\Microsoft.Sharepoint.Sandbox\14.0.0.0__71e9bce111e9429c