Ummmm.... An "exe" is the file extension for a EXEcutable file.
Yes, if you run an executable file, it can make a lot of changes to the operating system.
To the files, directories and windows registry.
It all depends what instructions are coded into the exe
There are also tools out there that allow you to repackage legitimate set up files or executable. They can 'bundle' them together with a virus or trojan and create a new exe that looks like a proper installer is working for whatever program you downloaded, but in the background it silently installs a virus/trojan/root kit without the punter knowing.
They can be sussed out by double checking the file size or by calculating & checking the CRC checksum.
They can also be downloaded from limewire
I thought everybody knew that???
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