How to get rid of fake window restore virus

A few days ago, my client reported that: "I seem to have a virus/spyware/malware on my computer. The virus/malware showed up yesterday, and within minutes completely delete my hard drive, all , my desktop is empty , I’m left with a blank desktop and no Documents / Files / Music / Pictures / Programs etc, and all of my programs are deleted , the spyware preventing me from using any antivirus/spyware programs to scan my computer."
I checked my client's computer , the computer is infected by Windows Restore spyware, it didn’t delete those files it just made the files attribute as “hidden”, and did the same thing with desktop shortcuts, all of your folders and everything.
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