All my files were encrypted

Hi,

I've a user using running on windows 7 and using SEP 12.1 with the updated definition. The pc was having problem since this morning where all the local document(xls,xlsx,doc,docs,powerpoint,pdf and etc) were encrypted without noticed. When tried to open these files, it shown error and the content changed to encrypted coding.

Is this infected by 'Trojan.ransomcrypt.f ' or 'CryptoDefense' ? I did run a full scan but SEP detected none of it.

My files are now all unaccessbible due to encrypted. Any advise to decrypt and recover my files ?

Appreciate assistance from anyone here.

Thank you.

regards,

Wong