If your program is Photoshop Elements 12, then you have posted in the wrong forum. Your thread is now in the Adobe Premiere Elements Forum (video editing).
Please re-post your question in the Adobe Photoshop Elements Forum or wait for a moderator here to see your thread here and move it from here to there.
While you are making your move, consider
a. what computer operating system is involved...if we assume Windows
b. have you checked Control Panel/Programs to assure that the program is no longer listed as an installed program?
If it is no longer installed, you might want to consider a free ccleaner run through (regular cleaner and registry cleaner parts) to get
rid of any leftovers from incomplete installs and uninstalls. Then reinstall with antivirus and firewall(s) disabled.