The following error is displayed while downloading Chrome, Ubuntu, Fedora or Windows Operating System:
Such error is displayed if Parallels Desktop has downloaded Operating System (e.g. Windows, Linux, Chrome) distribution but its checksum does not match the one, published in the Parallels Online Store. This can happen due to corruption during transmission over network or the published checksum does not match the file.
Re-download Operating System files by choosing "Try Again" option.
Delete this damaged Virtual Machine and start downloading it again from scratch. If you have a portable Mac please do not close the lid to avoid network interruptions.