How to retrieve programs displayed by system analyser


New Member
Recently I created a new program thinking it was an additional one. It wiped a lot of my original program files, some of which I reloaded from disk, but a number which I couldn’t.
Today I ran a program called “Glary utilities” which analyses the system. In “disk space analyser” there are 2 options,
“files and folders -all types” which show my current visible programs, and “show all files- all types” which show all the missing programs, listing the correct capacities and using up disk space.
They use extensions .mpg .mov and .wmv.
I am unable to open them, although .wmv and .mov do play on my PC
It seems they are still on the PC but where are they ? and how can I retrieve them

Please advise