Are all .exe files viruses?

No. Program files almost always have an .exe extension. That is why most virus files end in .exe; they are program files that corrupt your computer.

Are all .exe files viruses?virus scan

.exe files are programs, they are powerful in a sense of what they can do so they can well be nasty.

Programs (legit) use exe's but also viruses and such.

Are all .exe files viruses?anti virus scan

No! Most programs run in .exe files.
No.