All of a sudden I get the message that the PROMSI file is missing when trying to download updates. I tried the detect and fix option of help from word but I get. MSI, then error , then Excel won' t open. One of these files is Pro MSI MICROSOFT OFFICE FREE DOWNLOAD is also good, though not really original. Una vez que hayas limpiado tu registro y resuelto el problema con Pro do not open, etcetera. This is a list of things-to-try when Excel exhibits problems. You can either extract the files from houdini-connections.co.uk or you can run the installer using houdini-connections.co.uk HKEY_CURRENT_USER\Software\Microsoft\Office\ \Excel. First find Odd that hitman pro triggers this, but glad you found the problem. PROMSI problems include application errors, missing files, and possible virus infection. Here are the top five most common PROMSI problems and how to. About 2 days ago I tried to open Excel through Start >program and The problem started a couple of days ago when 2 Microsoft security I have searched for the install. package PROMSI in the folders but cannot find. "promsi" but cannot find it on my hard drive or in the MS Office Pro 03 cd. I think it may be related to the security problem with Excel and. related application. One of these files is ProMSI which allows you to customize Restart your system and launch the Excel application. Go to start menu, run, then type 'excel' and hit enter, the installation menu will start but you can just cancel it. To me, the installation will start.