[Solution] Steam Wont Open Fix Method 1: Close all the Steam tasks in the background. Sometimes your Steam client haven't shut down completely, and its processes or tasks are still running in the background. Method 2: Restart your computer. There may be tiny problems with the programs or processes on your operating system that stop your Steam client from opening. Method 3: Restart your network devices. You may not be able to open your Steam client because of the bad network status. ... See More....How do you fix cache?
Fix: Windows Store Cache May Be Damaged Windows 10 If the issue is with your Computer or a Laptop you should try using Restoro which can scan the repositories and replace corrupt and missing files. This works in most cases, where the issue is originated due to a system corruption.