You asked how long you should wait for ComboFix to run and I answered that. After I explained the various reasons why it may take longer, I thought you would advise me a which stage ComboFix was hanging up so I could provide further guidance. Knowing that information is helpful in order to determine which way to proceed from there.
As a general policy, Bleeping Computer does not offer advice
on how to run ComboFix unless we asked someone to run it or if there is a problem with the computer caused by running the tool. This is because people should not be using ComboFix without being advised to do so by a trained expert as the link provided by noknojon
When issues arise due to complex malware infections, possible false detections, problems running ComboFix (i.e. stalling, hanging, crashing) or with other security tools causing conflicts, experts are usually aware of them and can advise what should or should not be done while providing individual assistance. When false detections are identified, experts have access to the developer and can report them so he can investigate, confirm and make corrections. Those attempting to use ComboFix on their own do not have such information and are at risk when running the tool in an unsupervised environment.
While our policy is not to offer advice on running ComboFix unless we asked someone to run it, we are certainly willing to help with malware disinfection. Had you replied sooner, I would have instructed you how to properly stop ComboFix and then referred you to the "Preparation Guide For Requesting Help
" for assistance by the Malware Response Team Experts. If you continue to have issues, please read the Prep Guide and follow those instructions.