If you get a sharing violation error like the following while installing Mixcraft, quit all other programs and also close any folders that you might have open.
"Encountered a sharing violation while accessing C:\Program Files\Acoustica Mixcraft 7\mixcraft7.exe."
If you don't have any other programs open and you're still getting that error, check your anti-virus software. Make sure that the Mixcraft installer has permission to run. In some cases, you may need to temporarily disable your anti-virus software during installation.