An internet search on 'files changed to shortcuts' turned up several hits.
The link below might help.
"Files on my flash drives changed to shortcuts"
https://www.tomshardware.com/answers/id-1863228/files-flash-drives-changed-shortcuts.html
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someone said that iphone and mac don't get virus is that true?
Mac OS X is designed so that a computer activity can only be done if the user is recognized as having permission.
Users can be given permission to do some things and not do others.
This makes it very difficult to create a virus that can penetrate Mac OSX.
Furthermore there are fewer Macs than PC's.
So virus-writers find they have more success attacking PC's instead of Macs.
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and how to get rid all of the virus in
my friend computer?
Besides MSE there are several anti-virus programs. It may be necessary to use two or more on your computer.
Make sure the program has favorable reviews, and that you download it from the official website.
The only way to be sure a computer is clean of any virus, is to transfer you valuable data, re-format the drive and re-install everything.