Since there is no title given, try system restore to just before this attempt.
I accidentally aborted a software installation. When I tried to reinstall it, it seems it can detect an existing version in the system and resists to do a fresh installation, which prevents me from using the software. I tried to remove any traces as far as I know, like on hard disk and registry file by searching relevant keywords, but with no success. Can any one help me out on how to resolve this issue? Thanks!

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