Hi Dharmendra, thanks for your reply. This kind of errors, which cannot be reproduced on other machines are bad and leave no chance for developers to solve them. Unfortunately the installer does not leave any log files. The Windows event log has no entries about the installation attempt as well. I do not know what further information could be helpful. My first idea was that my installed MS Visual Studio 2008 could be the problem. Therefore I tried the "--install_runtimes 0" option - unfortunately with no success. My Visual Studio installation works as expected. I conclude it from various projects which all built fine. I am running a Windows 7 x86-64 for about 3 months and it runs without problems. I cleanly installed the system onto an empty, e.g. formated harddrive. As the first described error "An error occurred executing the Microsoft VC++ runtime installer" has been discussed with previous releases of PostgreSQL, e.g. http://forums.enterprisedb.com/posts/list/2328.page I think that it is a known issue. Moreover, exactly the same error has been described in the EnterpriseDB forum under http://forums.enterprisedb.com/posts/list/2303.page with PostgreSQL 9.0 and Windows 7 x86-64. However, both posts remain un-replied until today. If there are no other users out there with comparable problems I could give the ZIP-installer a try under: http://www.enterprisedb.com/products/pgbindownload.do There is a file postgresql-9.0.0-1-windows_x64-binaries.zip. I did not yet try this because I am new to PostgreSQL. I first have to figure - how to start the database from the command line, - how to setup the PostgreSQL service from the command line, - what registry entries are required. If you can answer the above three questions (each with one sentence), I will immediately start installation and tests, because I hope - from my short but good PostgreSQL 9.0 experiences under Linux - that just the installer fails on my system but not the database system itself. If you need any other information that might help, please let me know. I would really like to get some more knowledge about PostgreSQL. Regards, Peter -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general