Steam has been known to crash from time to time, either at startup every time you run it, or randomly. This is a very common problem that is also mentioned on the official Steam forums. The fixes mentioned there don’t seem to work.
What causes the Steam client to crash?
The problem may be caused by an antivirus program on your computer.
If the data stored in the AppCache folder is corrupted, this can cause this problem.
Maybe a third-party application installed on your computer is causing the problem.
There are times when Steam requires high privileges to run certain processes. If it does not have administrator access, this problem may occur.
ClientRegistry.blob is where your registration information and installed games are stored. If the data stored there has been corrupted, it may be causing this problem.