If you don't know exactly what kind of malware you are infected with, begin by following the steps from our preliminary malware troubleshooting article.
If you know what type of malware is present on your system, the Knowledgebase articles below contain instructions to clean the most common types of malware:
Best practices to protect against Filecoder (ransomware) malware
Does ESET protect me from Filecoder (CryptoLocker) malware?
How do I clean a TeslaCrypt infection using the ESET TeslaCrypt decrypter?
Clean a Crysis or Wallet infection using the ESET Crysis decryptor
Stand-alone malware removal tools
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