Well for one a lot of games now require steam to run for example when I first got Half Life 2 it installed steam and I thought it was nonsense and now well it's huge. Umm try reinstalling it you should be ok.
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.
Originally Posted by ShortySmalls
i tryed downloading it from steams website and still get the same error
EDIT: I tryed 1 last thing, was to run ccleaner and fix the registry errors then tryed to install steam and it worked likea charm. MW2 5 min from being done installed