A Study to Evaluate the Safety and Efficacy of Ombitasvir/Paritaprevir/r With or Without Dasabuvir and With or Without Ribavirin in Chronic Hepatitis C Virus Genotype 1 or 4 Infected Adults With Successfully Treated Early Stage Hepatocellular Carcinoma

Inclusion Criteria: 1. Male or female, at least 18 years of age at time of screening 2. Chronic hepatitis C virus (HCV) infection prior to study enrollment with screening laboratory results indicating HCV genotype 1 or 4 infection 3. Early stage hepatocellular carcinoma (HCC) diagnosed based on the typical hallmark of HCC (hypervascular in the arterial phase with washout in the portal venous or delayed phases) 4. Compensated cirrhosis defined as a Child-Pugh score of 5 or 6 at Screening • A minimal rim of ascites if detected at imaging is acceptable. Exclude ascites that requires the need to apply diuretic treatment to control ascites 5. Documented complete response to HCC treatment. 6. Females must be post-menopausal for more than 2 years or surgically sterile or practicing acceptable forms of birth control. Exclusion Criteria: 1. Use of known strong or moderate inducers of cytochrome P450 3A (CYP3A) in participants receiving ombitasvir/paritaprevir/ritonavir (OBV/PTV/r) with and without dasabuvir (DSV), strong inducers and inhibitors (e.g., gemfibrozil) of cytochrome P450 2C8 (CYP2C8) in participants receiving OBV/PTV/r with DSV, medications contraindicated for ritonavir or RBV (for those that receive RBV) within 2 weeks or 10 half-lives (if known), whichever is longer, prior to study drug . For medications contraindicated with AbbVie's 2-direct-acting antiviral agent (2-DAA) and 3-DAA regimen, refer to the recommended prescribing information section of the approved local product labels. 2. Positive test result for hepatitis B surface antigen (HBsAg) or anti-human immunodeficiency virus antibody (HIV Ab). 3. Patients regardless of eligibility to liver transplant, who have a comorbid disease that might preclude completion of study follow-up. 4. Clinically significant abnormalities, other than HCV infection, in a participant with HCC based upon the medical history, physical examination, vital signs, laboratory profile and a 12-lead electrocardiogram (ECG) that make the participant an unsuitable candidate for this study in the opinion of the investigator.