Updater "Access to path is denied"

Hi.We are using wyUpdate for our project and we have encountered a problem with an update on one of our client's computer. This happens only on this computer and problem does not appear on any other computers.Here are some screen shoots.http://i44.tinypic.com/2dl29av.pnghttp://i41.tinypic.com/deu1j9.png

Text is in Polish and error message means "Access to path is denied". We have suggested our client to close all FireWall/Antivirus programs durning the update process and it didn't helped. User account from that screenshoot has admin rights. Reinstall of our application didn't helped too.

Is this related to this problems?https://wyday.com/forum/t/1445/failed-to-create-the-automatic-updater-temp-folder-access-to-the-path-s-png-is-denied/https://wyday.com/forum/t/2198/wyupdate-error-during-the-update-error-trying-to-save-file/

Something is changing the permission to the file or locking the file. It's either an anti-virus program or it's a virus. They should upgrade their anti-virus software (avoid the crap brands -- if they're using a new version of Windows them tell them to install the Microsoft anti-virus software). Tell them to do a full scan of their computer.