try the following : Disable/Configure any anti-spyware or anti-virus software on your system during installation process. For example: Spybot Search and Destroy Program or Norton Anti-Virus Check to see if any spyware or adware is installed on your system blocking the completion of install process. For detailed instructions,Check to see if you find any unwanted entry in Add/Remove Programs or Internet Explorer - Add/On's section (Tools - Internet Options - Programs -> Manage Add On's). If you found one, remove/disable this entry. On Windows Vista, disable UAC (User Access Control) feature for your account and download/reinstall Java again from:

Hi All, I have a windows installer, with a registry write custom action in it. When i run this installer on windows 7, in some machines, i'm facing this problem, where, the installation fails and the key wouldn't be created in the registry. But in some Windows 7 systems it works absolutely fine. The error that i get is : #1721- there is a problem with this installer package. a program requried for this installation to complete could not be run. contact your administrator or package vendor. I'm cracking my head over this to find a solution!!! Please help.