or steam.exe and shut it down by force (in processes) then do the .blob file thing, if it doesnt work completely uninstall steam, delete everything thats left manually, and clean all traces of steam from registry then make a fresh install
You can also backup your games using steam's backup so you dont lose them in the process but keep them outside steam's directory so they arent in your way.
I also found this:
Code:
Answer
This issue is caused by a third-party application interfering with the normal operation of Steam - one process which has been identified with this crash is the Tuneup WinStyler Theme Service. Other applications such as BitTorrentDNA have also been confirmed to cause this issue.
Please see the Disabling Background Applications article for instructions on how to disable background applications. If disabling the application does not allow Steam to function correctly, you may want to consider completely uninstalling any applications that you believe may be causing the conflict to test Steam again.
If the issue persists, please see the list of Programs Which Interfere with Steam and Spyware, Adware, and Viruses Interfering with Steam in order to ensure that any programs known to cause issues with Steam are disabled.
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