It's best to keep such installers in area where other applications is not installed or being installed.
Example: Create a new folder in your documents or desktop locations instead of saving them in C: and Program Files folder where other application is kept/installed/run from.
Much better if it's stored in another partition or other media
is there a downside of leaving sharewire, such as limewire, on one's pc when not in use. i.e. can files be corrupted or copied, etc. is is best to uninstall such software daily?