Windows 7: sfc/ scannow stops at 68%

Hi everyone,

Sorry to disturb you but I read all the topic and I have some problem with the comand sfc/ scannow when I run it, it stops at 68%
My first intention was only to check my system files because my Windows Intaller doesn't work anymore and it tells me that my msi.dll file is dammaged (so I can't install open office or java anymore...)
But when I run sfc / verifyonly it tells me there is some integrities violations but when I read the CBS file I can't see where it is (I attached it to the post I think...)



Can someone help me ? I don't really know anything complicated when it comes to computers...

Thank you in advance...