Tough call. If they are not complete then you can try to continue. In meantime see if there are alternatives to download.

I almost always continue them. They do often complete eventually during one of the redownload attempts, at least in my experience. Question is why does the download hash not equate to the actual file. Was it data loss during transfer, data corrupted during transfer, even possibly via some security device on your computer or a disk drive that is badly fragmented, ... or was some of the data changed in the original such as information tag or something. Some files are corrupt at the source, not sure if that's due to the file itself or something between me & them that corrupts the file transfer.