This is for those who are facing an issue in installation of PSoC Designer 5.1 SP 2, where the installation hangs and does not complete. It issue has been faced by some users using Windows 7, Vista, XP. This is due to a Microsoft Installer Bug. This message is seen in the PSoC Designer 5.1 SP 2 download page ( http://www.cypress.com/?rID=41083) also.
So presently Cypress has provided a workaround by releasing an Emergency Patch. This can be downloaded at: