virus converts usb folders to shortcuts

You could try this

Insert your flash drive before we begin. Hold down the Shift key when inserting the flash drive until Windows detects it to bypass the autorun feature. This will keep the autorun.inf from executing automatically.

Please have all your removable storage devices ready for disinfection.

Download Flash Disinfector by sUBs and save it to your desktop.

• Double-click Flash_Disinfector.exe to run it.
• Your desktop and icons may disappear. This is normal.
• It will do a cleanup of removable storage devices, and write a protected Autorun.inf file to help prevent re-infection.
• Follow any prompts that may appear.
• The utility may ask you to insert your flash drive and/or other removable drives including your mobile phone. Please do so and allow the utility to clean up those drives as well.
• Wait until it has finished scanning and then exit the program.
• There will be no GUI interface or log file produced.
• Reboot your computer when done.

Note: Flash_Disinfector will create a hidden folder named autorun.inf in each partition and every USB drive plugged in when you ran it. Don't delete this folder. It will help protect your drives from future infection.

However you should consider following through with the below.
READ & RUN ME FIRST. Malware Removal Guide