Lightroom Installation Error

Question

Exit Code: 7
Please see specific errors below for troubleshooting. For example,  ERROR:
-------------------------------------- Summary --------------------------------------
- 0 fatal error(s), 3 error(s)
----------- Payload: Adobe Photoshop Lightroom 5 5.3.0.0 Adobe_Lightroom_x64.msi_5.3 -----------
ERROR: 錯誤 1714。無法移除舊版的 Adobe Photoshop Lightroom 5.3 64-bit。請聯絡您的技術支援小組。
ERROR: Install MSI payload failed with error: 1603 - 安裝時發生嚴重錯誤。
MSI Error message: 錯誤 1714。無法移除舊版的 Adobe Photoshop Lightroom 5.3 64-bit。請聯絡您的技術支援小組。
ERROR: Third party payload installer Adobe_Lightroom_x64.msi failed with exit code: 1603
How to fixed the error?

Answer 1

Isokiller to confirm when you try to run the uninstaller you receive an error regarding the missing MSI file?  If this is the case then please attempt to use the Microsoft FixIt tool available at http://support.microsoft.com/mats/program_install_and_uninstall/en-us to remove the entry for Photoshop Lightroom.
Once this is done you should be able to overwrite the existing files by reinstalling as Kglad as has suggested.