If the pre-job VSS snapshot completes and doesn’t get deleted in order to free up storage during the clone, then nothing would interfere with the data involved in the clone process. If the pre-job VSS snapshot doesn’t complete or gets deleted mid-job, then the clone fails. The latter would obviously leave your destination disk unusable, but there isn’t a possibility of something surreptitiously tampering with the data Reflect is cloning while the clone is happening. Same for image backups. Otherwise it wouldn’t be advisable for ANYONE to perform these operations inside Windows. VSS has been around since Windows XP and is very widely used to perform online clones and backups, so although you are of course free to do whatever you want, cloning from Rescue truly isn’t necessary. The only exceptions would be if you’re having VSS problems, in which case you should try to solve that because VSS issues can create other problems in Windows, or if you have a third-party anti-virus solution that creates interference, but even that would only either prevent the clone from occurring or cause it to take a lot longer. It would not affect the integrity of the data being cloned. Bottom line: If your clone operations work at a reasonable speed within Windows, there’s no reason not to perform them within Windows.