I have arch linux installed on my system... then i tried to install virtual box through pacman.... every thing goes fine until following errors are displayed..

(2/2) checking package integrity [###########################################] 100%
error: virtualbox-host-modules: key "38DCEEBE387A1EEE" is unknown
error: key "38DCEEBE387A1EEE" could not be looked up remotely
error: virtualbox: key "38DCEEBE387A1EEE" is unknown
error: key "38DCEEBE387A1EEE" could not be looked up remotely
error: failed to commit transaction (invalid or corrupted package (PGP signature))
Errors occurred, no packages were upgraded.

Hi,

you can try to clean out pacman's cache by:

or just remove the offending package(s) from the cache (/var/cache/pacman/pkg/). then you may want to re-check the mirrors you're using and make sure you have the most up-to-date ones. after that you need to refresh the mirrors by:

and finally refresh the keys by: (I assume you configured pacman and initialized the keyring already)

then try to install the package again. also it is a good idea to read up about `pacman-key` and `pacman` at https://wiki.archlinux.org/index.php/Pacman-key and https://wiki.archlinux.org/index.php/Pacman if you haven't already

you can also add unofficial keys to the database. read up about this in the wiki page.