hi tomrefrag
what was the avast that you had installed?
avast! Free
avast! Pro
(or) avast! Internet Security
(or) did you still have avast 4.8 installed?
The problems that generates error 536870929 don't occur that often and sometimes is related to having more than one resident AV run on the system, or remnants of a previous that is still active even though the AV has been uninstalled by conventional method like Windows Add/Remove programs in Control Panel.
For this scenario, avast provides the uninstall utility, which can be run after conventional uninstall and is designed to remove any remaining troublesome remnants - find it here: http://www.avast.com/uninstall-utility - choose which applies to yr system and run it in Safe Mode.
You could also firstly run a conventional uninstall using Revo Uninstaller - make sure you download Free option at the bottom of Freeware column -
http://www.revouninstaller.com/revo_uninstaller_free_download.htmlor another option is to work through this site: Ultimate List of Uninstallers - there are guide to uninstall utility for both avast v4.8 and v5 -
http://uninstallers.blogspot.com/Use Ultimate List of Uninstallers to better remove remnants from any other AV that may have been previously installed.
Also you can use ccleaner to help clean up any crap still may be clogging the system - http://www.piriform.com/ccleaner/download/slim - and defraggler can be helpful too for tidy up of files - dfraggler slim:
http://www.piriform.com/defraggler/download/slimAnd be best to begin yr own thread (and provide a link to it) rather than keep posting here where you are unlikely to draw much favorable response -
