We have created a "cleanup" tool which will wipe out all CoSMOS file and registry settings. THIS TOOL SHOULD ONLY BE USED AFTER COSMOS HAS BEEN UNINSTALLED THROUGH ADD/REMOVE PROGRAMS.
Unzip the tool to your desktop or other file location. It consists of a single .bat file. Right click and run this file as Administrator.
Once that is done, try installing CoSMOS again. If you still receive errors, please let us know so that we can investigate further.
Download CoSMOS Cleanup Tool --> Link
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