HELP - I was hacked

Ok , I just wake up this morning and my pc was in mess . All my files and folders and programs are .WALLET. And I have notice in my pc "Hello my vichtim
All  files on your PC encryphted!
my email: mk.goro@aol.com or reserve- mkgoro@india.com" And they want me to pay them with bitcoins. Somthink like this and I read a litle and this is "dharma hack " . Now I try some programs to recove my files but I`m not sure what I realy do . If someone can help .....

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