This batch of errors may have something to do with your problems...
Code:
Checking Component Store
(f) CSI Payload File Missing 0x00000000 Koala.jpg amd64_microsoft-windows-photosamples_31bf3856ad364e35_6.1.7600.16385_none_f36e0e659b8042be
(f) CSI Payload File Missing 0x00000000 Jellyfish.jpg amd64_microsoft-windows-photosamples_31bf3856ad364e35_6.1.7600.16385_none_f36e0e659b8042be
(f) CSI Payload File Missing 0x00000000 SampleRes.dll amd64_microsoft-windows-photosamples_31bf3856ad364e35_6.1.7600.16385_none_f36e0e659b8042be
(f) CSI Payload File Missing 0x00000000 desktop.ini amd64_microsoft-windows-photosamples_31bf3856ad364e35_6.1.7600.16385_none_f36e0e659b8042be
(f) CSI Payload File Missing 0x00000000 Desert.jpg amd64_microsoft-windows-photosamples_31bf3856ad364e35_6.1.7600.16385_none_f36e0e659b8042be
(f) CSI Payload File Missing 0x00000000 Lighthouse.jpg amd64_microsoft-windows-photosamples_31bf3856ad364e35_6.1.7600.16385_none_f36e0e659b8042be
(f) CSI Payload File Missing 0x00000000 Tulips.jpg amd64_microsoft-windows-photosamples_31bf3856ad364e35_6.1.7600.16385_none_f36e0e659b8042be
(f) CSI Payload File Missing 0x00000000 Chrysanthemum.jpg amd64_microsoft-windows-photosamples_31bf3856ad364e35_6.1.7600.16385_none_f36e0e659b8042be
(f) CSI Payload File Missing 0x00000000 Hydrangeas.jpg amd64_microsoft-windows-photosamples_31bf3856ad364e35_6.1.7600.16385_none_f36e0e659b8042be
(f) CSI Payload File Missing 0x00000000 Penguins.jpg amd64_microsoft-windows-photosamples_31bf3856ad364e35_6.1.7600.16385_none_f36e0e659b8042be
(f) CSI Payload File Missing 0x00000000 Clip_1080_5sec_VC1_15mbps.wmv amd64_microsoft-windows-winsatmediasamples_31bf3856ad364e35_6.1.7600.16385_none_0b34d0642122c1c4
(f) CSI Payload File Missing 0x00000000 Clip_480_5sec_6mbps_h264.mp4 amd64_microsoft-windows-winsatmediasamples_31bf3856ad364e35_6.1.7600.16385_none_0b34d0642122c1c4
(f) CSI Payload File Missing 0x00000000 winsat.wmv amd64_microsoft-windows-winsatmediasamples_31bf3856ad364e35_6.1.7600.16385_none_0b34d0642122c1c4
(f) CSI Payload File Missing 0x00000000 Clip_1080_5sec_MPEG2_HD_15mbps.mpg amd64_microsoft-windows-winsatmediasamples_31bf3856ad364e35_6.1.7600.16385_none_0b34d0642122c1c4
(f) CSI Payload File Missing 0x00000000 Clip_1080_5sec_10mbps_h264.mp4 amd64_microsoft-windows-winsatmediasamples_31bf3856ad364e35_6.1.7600.16385_none_0b34d0642122c1c4
(f) CSI Payload File Missing 0x00000000 winsatencode.wmv amd64_microsoft-windows-winsatmediasamples_31bf3856ad364e35_6.1.7600.16385_none_0b34d0642122c1c4
(f) CSI Payload File Missing 0x00000000 Clip_480i_5sec_6mbps_new.mpg amd64_microsoft-windows-winsatmediasamples_31bf3856ad364e35_6.1.7600.16385_none_0b34d0642122c1c4
(f) CSI Payload File Missing 0x00000000 Clip_480p_5sec_6mbps_new.mpg amd64_microsoft-windows-winsatmediasamples_31bf3856ad364e35_6.1.7600.16385_none_0b34d0642122c1c4
(f) CSI Payload File Missing 0x00000000 desktop.ini amd64_microsoft-windows-videosamples_31bf3856ad364e35_6.1.7600.16385_none_51a21f033003affd
(f) CSI Payload File Missing 0x00000000 Wildlife.wmv amd64_microsoft-windows-videosamples_31bf3856ad364e35_6.1.7600.16385_none_51a21f033003affd
(f) CSI Payload File Missing 0x00000000 Kalimba.mp3 amd64_microsoft-windows-musicsamples_31bf3856ad364e35_6.1.7600.16385_none_06495209cbd8e93b
(f) CSI Payload File Missing 0x00000000 desktop.ini amd64_microsoft-windows-musicsamples_31bf3856ad364e35_6.1.7600.16385_none_06495209cbd8e93b
(f) CSI Payload File Missing 0x00000000 Maid with the Flaxen Hair.mp3 amd64_microsoft-windows-musicsamples_31bf3856ad364e35_6.1.7600.16385_none_06495209cbd8e93b
(f) CSI Payload File Missing 0x00000000 Sleep Away.mp3 amd64_microsoft-windows-musicsamples_31bf3856ad364e35_6.1.7600.16385_none_06495209cbd8e93b
(f) CSI Payload File Missing 0x00000000 desktop.ini amd64_microsoft-windows-ehome-samplemedia_31bf3856ad364e35_6.1.7600.16385_none_b6b9b223710b3802
(f) CSI Payload File Missing 0x00000000 win7_scenic-demoshort_raw.wtv amd64_microsoft-windows-ehome-samplemedia_31bf3856ad364e35_6.1.7600.16385_none_b6b9b223710b3802
It looks to me as if someone has been attempting to 'tidy up' the system by deleting files that they don't use - and removed them from the protected area of the OS.
I'll post a fix to repair those files later (possibly tomorrow, now) and we'll see if that helps at all.
There are a couple of errors in the CBS.log (actually the same error twice, once at shutdown and again on boot) -
Code:
2013-10-18 17:10:37, Info CBS Shtd: Processing non-critical driver operations queue, Count 1.
2013-10-18 17:10:37, Info CBS Doqe: Locking driver updates, Count 1
2013-10-18 17:10:37, Info CSI 0000001b Performing 1 operations; 1 are not lock/unlock and follow:
LockComponentPath (10): flags: 0 comp: {l:16 b:7ee0cfd10bccce0192030000080a9014} pathid: {l:16 b:7ee0cfd10bccce0193030000080a9014} path: [l:172{86}]"\SystemRoot\WinSxS\amd64_bth.inf_31bf3856ad364e35_6.1.7601.17607_none_d0789c5ad225ef11" pid: a08 starttime: 130265786204997858 (0x01cecc0ad922c8e2)
2013-10-18 17:10:37, Info CBS Doqe: q-uninstall: Inf: bth.inf, Ranking: 2, Device-Install: 0, Key: 1, Identity: bth.inf, Culture=neutral, Type=driverUpdate, Version=6.1.7601.17607, PublicKeyToken=31bf3856ad364e35, ProcessorArchitecture=amd64, versionScope=NonSxS
2013-10-18 17:10:37, Info CBS Perf: Doqe: Uninstall started.
2013-10-18 17:10:37, Info CBS Doqe: [Forward] Uninstalling driver updates, Count 1
2013-10-18 17:10:37, Info CBS DriverUpdateUninstallUpdates failed [HRESULT = 0x80070490 - ERROR_NOT_FOUND]
2013-10-18 17:10:37, Error CBS Doqe: Failed uninstalling driver updates [HRESULT = 0x80070490 - ERROR_NOT_FOUND]
I'll see what I can do about that after we've fixed the file errors.