I would suggest that you download and run "Malware Bytes". You can execute a search for it and it should come from www.malwarebytes.org
During the install process, it should have some check boxes that ask if you want to download and install some other "disk cleaner" or something like that... un-select this check box during the install.
I suggest starting with the "Quick Scan". This should find most things. If not, run the full scan.
I fix computers as a side job. And this is my goto tool.