Hi,
The question about AsHelper. You probably have some program from Aimersoft installed on your computer which is creating some conflict with the system on occasion. So you can uninstall the software and use different similar software or try updating the software.
Windows software malicious removal tool is an update sent to all Windows user and is OK to have installed , it is normal that it asked for licence agreement.
Why your update history has been removed I do not really know. Maybe you used some kind of cleaning program which cleaned WinSxS folder and deleted the update history. Well the update history is not important to the system and some users clean all these log files and Update files on regular basis, so nothing to worry about.
Hope it helps,
David