According to Microsoft, if you remove FSX from the computer and then try to reinstall the game, FSX does not install and you receive a “1722” error message, which represents that a system level failure has occurred. In most cases, you will receive another error message that is followed by a “1605” installer error message.
To solve the problem, one needs to obtain the Software Licensing System Reset Tool (MSKB928080.exe) and extract the files to C:\MicrosoftKB928080. If an Open File – Security Warning dialog box appears, click Run. Now run the Software Licensing System Reset Tool as below:
- Click Start
- Click All Programs
- Click Accessories
- Click Command Prompt
- At the command prompt, type the following command in the Open box: C:\MicrosoftKB928080\resetsldl –All
- Click OK
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