dual boot system (XP & Win 7-64) 7 reboot corrupts disk

Help! I have a dual boot system (XP & Win 7-64) with the Win 7 installed 2nd. I set it up to migrate away from XP.
When I reboot the system from Win 7 it restarts and then immediately upon log-on I get a series of errors that the disk is corrupt (most applications trying to load & error 55 in event viewer). If I restart into win 7, dskchk /f runs as scheduled but is unable to repair the file structure (something about MFT unable to be written to). When I to choose XT from the boot menu Chkdsk /f runs and repairs the disk. At log-in I choose to restart computer and boot into win 7, then it starts up and runs as expected. Except for occasionally it reboots itself (about once a week) with Windows Kernel event ID 41 error "The system has rebooted without cleanly shutting down first" forcing me to choose XT at boot menu so chkdsk can do it’s thing.
I no longer need XT and would like to get rid of it; how can I do that safely without starting over from scratch? Will getting rid of XP solve the chkdsk problem?
I have an identical dual boot system on another computer and it has none of these problems.

Thanks!

I have run SFC /scannow on the affected machine and it found errors that it could not fix. CBS log attached here.

Sorry you were abandoned with no follow up.

While you wait, work through the Troubleshooting steps in my signature pic below. Test the hard drive first with both Maker's diagnostics extended scan and a full Disk Check if necessary done from the Win7 disk Command Line from steps given.

Then run SFC a few more times to see if it will fix the found problems. It also shows in the SFC tutorial how to manually fix the files. If these will not repair then often what works is the Repair Install. All of these are linked to illustrated tutorials in the Troubleshooting tutorial.