SFC will not complete

Hi There,
We have a fairly new machine with Windows 7 home premium. The OS is installed on a solid state drive and for some reason, we can't run a SFC successfully. we run as an adminstrator from the command prompt and get to 19% and then get "windows resource protection found corrupt files but was unable to fix some of them"
We get the same in safe mode but with the addition of the notification "There is a system repair pending which requires a reboot to complete. Restart windows and run sfc again". Of course that doesn't help.
Can anyone help please?
Thanks
Paul

Well I tried the windows upgrade repair and that kind of worked.
After the repair I tried the sfc /scannow and it completed 100% without asking for the disk but still came up with:
"windows resource protection found corrupt files but was unable to fix some of them"
Any more thoughts please?
Thanks
Paul

Thanks and I will try that tomorrow but I wonder why the repair didn't replace all of the files and SFC still found errors?

Thanks for all helping me. I tried SFC 3 times and still came up with the error. I tried to access the log file but I dont have permission to open it. I thought it might be useful to see what files were corrupt before doing a repair install. What do you think please?