If your System Restore hasn’t been completed even after 1 ½ hour, there could be something wrong with it. Although the restoration will happen within 45 minutes, the duration may take longer based on different aspects. For instance, the amount of data and the speed of your SSD might impact the duration. However, if it takes longer than 2 hours, that means a red flag. In that case, you should use the solution we have mentioned in this guide. So, if you wonder how long system restoration takes, it is about 1 hour on average.