Ok, so yesterday I did everything as you said and the virus seemed to be gone. I could insert any usb and there wouldn’t be any shortcuts. Today, after restarting my computer, I insert an empty memory card. MCShield scans it and doesn’t find an infection. I create a new folder and 2 seconds later a shortcut of this folder appears. Avast software starts to give a message that a thread has been found and blocked. The thing is that it keeps giving this message over and over again, like the files it blocks keep being recreated after they are blocked… I reinsert the memory stick and now MCShield also finds that the card is infected.

It now even creates shortcuts to random folders on my computer… For instance the target of one shortcut folder is
" C:\Windows\system32\cmd.exe /c start iTunesHelper.vbe&start explorer New" “folder” "(2)&exit "

It also keeps creating these trzxxx.INK files. The ones that avast keeps blocking I guess…

What do I do now?

(added an image of what the avast message keeps saying ( for action it says " moved to vault " ) for different files and the scanlog of MCShield)