After installing PGP Desktop on a Windows 7 computer and rebooting the system to complete the installation, the computer continually prompts you to reboot the system.
This can be caused by an incompatibility with PGP Desktop and a Sophos Encryption software installed on the system.
Even though the PGP Whole Disk Encryption (PGP WDE) feature of PGP Desktop is not being used, PGP Desktop installs the PGP WDE drivers by default. To resolve this issue, uninstall PGP Desktop and reinstall the software using an MSI switch to exclude the PGP WDE component.
For more information on using an MSI switch when installing PGP Desktop, see this article.