From what I can see in the cbs.log your computer has several important files that have been damaged or corrupted. After 7 runs it's unlikely that the system file checker scan will be able to repair them. And that means you're going to have a hard decision to make.
I suspect the damage was caused in part by malware. Once a computer becomes infected there's no way to be 100% sure that all traces of the malware have been removed. The malware can be so deeply embedded that all malware scans miss it. And it's capturing information like credit card numbers, passwords, etc. Reformatting the hard drive and reinstalling Windows 7 (along with all of your other installed programs) is suggested. Here are two tutorials to explain more: Clean Reinstall - Factory OEM Windows 7 Clean Install Windows 7
Another possibility is restoring your computer to factory specs. You might have a hidden recovery partition on the hard drive. Or you might have made a set of recovery disks when you first got the computer. A recovery would have the same effect as reformatting/reinstalling.
A third possibility, and the least destructive, would be a repair install. This would fix your currently installed Windows 7 and preserve your user accounts, data, programs, system drivers
, etc. The problem here is you still wouldn't know for sure that all traces of malware have been removed. Repair Install
For a clean install or a repair install you'll need an actual copy of the Windows 7 installation media (not a system repair disk or a set of recovery disks.) Since many computers no longer come with the install disk, you can download an official Microsoft ISO file from Digital River and then burn that ISO to a DVD. You will also need the 25-digit Product Key to reactivate your computer with Microsoft. The Product Key is on the COA sticker usually located on the bottom of the notebook or under the battery in the battery compartment. Official Windows 7 SP1 ISO from Digital River « My Digital Life
So this is the hard decision ... how do you want to proceed?