Changing object/folder permissions on the fly, using runas

Here is a tip to get access to that folder without have to log off and log back in as somebody with admin privs.

Use runas to get to the command prompt:
runas /user:Administrator "cmd.exe"

In the privileged command prompt, use the below command for folder "xyz", granting user "thisuser" full access:
cacls xyz /E /G thisuser:F

For more info, read the man page for cacls.