Ouch - with that number of files missing (and the type of some of them) I wouldn't be surprised if a repair install failed.
I suspect that you have a deeper problem, since many of the missing files are from the original installation, rather than from updates.
It doesn't look to me as if it's a RAM problem, so I suspect the Hard Drive.
... Please open Event Viewer
In the left pane, navigate to the Windows Logs
right-click on Applications and select 'Save all events as...' save as Apps.evtx
repeat for the System logs - save as Sys.evtx
Compress both files, and attach to your reply or upload to your favourite fileshare site (preferably Dropbox or OneDrive/SkyDrive) and post a link in your reply