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These are Microsoft Windows Hotfix installer log files. They contain all the changes that a particular hot fix made on your system. You can safely delete these files. You can delete them by yourself, or use Piriform CCleaner to clean the log files : http://www.piriform.com/
Those are hotfix uninstallers. If after installing a Windows hotfix (manually or through auto update) you want to uninstall it later, these uninstaller are used to uninstall those hotfixes. Most of the time nobody needs to uninstall the hotfixes.
You can once again use CCleaner to remove them. You would find option Hotfix Uninstallers under the Advanced section. Check this option if you want to remove these uninstallers.