If you have worked with MSI for a while, I bet you have encountered this: You have built and installed an MSI. Later on you change the WiX of it and build the new MSI, when you try to uninstall the old MSI with the new one, the uninstall fails.
In this case, you can
1) Use the utility tool MSIZap to clean up manually.
2) Or, do a force install with the new MSI using msiexec’s Repair Options. After that you can uninstall the MSI and go back to the good state.
msiexec /i /fe your_installer.msi
Repair Options
/f[p|e|c|m|s|o|d|a|u|v]
Repairs a product
p - only if file is missing
o - if file is missing or an older version is installed (default)
e - if file is missing or an equal or older version is installed
d - if file is missing or a different version is installed
c - if file is missing or checksum does not match the calculated value
a - forces all files to be reinstalled
u - all required user-specific registry entries (default)
m - all required computer-specific registry entries (default)
s - all existing shortcuts (default)
v - runs from source and recaches local package