System32 - CMD - Shortcut Virus

Hi!
my brother instaled some “games” in my computer and now all my files in the USB drive turned into shortcuts.
All that i know is that the virus is in the CMD on the System32
I used the antivirus and antimaware but nothing was detected

Can anyone help me please?

disconnect all usb drives…
download and install MCShield. www.mcshield.net
then connect your usb drive… post the log here

then follow instructions here and attach logs (not copy and paste) http://forum.avast.com/index.php?topic=53253.0

we need Malwarebytes / OTL / aswMBR log

when done, malware experts will be notified and help you
since it is past midnight here in europe you may not recive a reply today

Your brother didn’t installed games, he installed malware.
Why letting your brother using your system?
Why not let him only use a account with limitations?

yepp…kids, probably downloaded some cracked game. :-\