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Windows 7: Intermittent 7B on startup

01 Dec 2018   #1

Windows 7 Pro x64
Intermittent 7B on startup

This started happening earlier this week; I get a 7B error (0xFFFFF880003A9928) on startup, but not every time or even every day. Every time it's happened so far, I could simply reboot normally without having to go to safe mode. I ran chkdsk /f which came up with no errors.

I hadn't added any new hardware, touched system settings or even updated any drivers recently so I haven't a clue what might've caused this to start happening now.

I ran a startup repair earlier which came up with an error that it couldn't repair (or it couldn't come up with any errors it could repair?), but I hope the details of that are in this dump file.

Currently it's a minor inconvience at worst, but I'd still like to solve it before/if it gets worse.

My System SpecsSystem Spec
01 Dec 2018   #2

Windows 10 Pro

My System SpecsSystem Spec
01 Dec 2018   #3

Windows 7 Pro x64

I got the boot log file which appears to hang at CLASSPNP.SYS
My System SpecsSystem Spec

02 Dec 2018   #4

Windows 10 Pro

The dump present in the logs is a 0x4A which is different from a 0x7B, without a dump of the 0x7B I'm not sure if there happens to be a relation.

The ntbtlog.txt only shows any driver that was(n't) loaded. I'm not sure how useful that is.

Have you had a chance to look at the link I posted in my previous post?
My System SpecsSystem Spec
02 Dec 2018   #5

Windows 7 Pro x64

Yes, but I'm not sure which one of these apply since they make no distinction between every boot vs occasional boot.

I guess I could give the defender offline thing a go as soon as I have access to another PC.

Also I didn't find a 4A error, where did you see that?
My System SpecsSystem Spec
02 Dec 2018   #6

Windows 10 Pro

I suggest to try options 3 and 6, tests related to the filesystem and hard drive.

The 0x4A is the dump from your logs.
My System SpecsSystem Spec
02 Dec 2018   #7

Windows 7 Pro x64

You mean the .dmp file? Because I just looked at that myself and noticed there are no events in it since May. That 4A error is over six months old.

According to the windows disk management, the system reserved partition is already active so I guess that leaves me with just #3, I already ran chkdsk /f but I guess I'm supposed to run it with both /f and /r?
My System SpecsSystem Spec
03 Dec 2018   #8

Windows 10 Pro

.dmp is the dump file extension, so yes I mean the .dmp file

/r includes /f and does a little more, /f fixes errors, /r will attempt to recover any data. So only /r is really needed.

I just noticed a small mistake, in my previous post I wrote options 3 and 6, it should actually be options 3 and 7.
My System SpecsSystem Spec
03 Dec 2018   #9

Windows 7 Pro x64

Well I just finished running chkdsk /r and it still came back clean. I'll run SeaTools next.

Here's the result from the event viewer anyway tho.

Checking file system on C:
The type of the file system is NTFS.

A disk check has been scheduled.
Windows will now check the disk.

CHKDSK is verifying files (stage 1 of 5)...
1194240 file records processed. File verification completed.
16066 large file records processed. 0 bad file records processed. 2 EA records processed. 92 reparse records processed. CHKDSK is verifying indexes (stage 2 of 5)...
1320162 index entries processed. Index verification completed.
0 unindexed files scanned. 0 unindexed files recovered. CHKDSK is verifying security descriptors (stage 3 of 5)...
1194240 file SDs/SIDs processed. Cleaning up 75 unused index entries from index $SII of file 0x9.
Cleaning up 75 unused index entries from index $SDH of file 0x9.
Cleaning up 75 unused security descriptors.
Security descriptor verification completed.
62962 data files processed. CHKDSK is verifying Usn Journal...
36429480 USN bytes processed. Usn Journal verification completed.
CHKDSK is verifying file data (stage 4 of 5)...
1194224 files processed. File data verification completed.
CHKDSK is verifying free space (stage 5 of 5)...
9197256 free clusters processed. Free space verification is complete.
CHKDSK discovered free space marked as allocated in the volume bitmap.
Windows has made corrections to the file system.

976657407 KB total disk space.
937998860 KB in 976618 files.
539108 KB in 62963 indexes.
0 KB in bad sectors.
1330415 KB in use by the system.
65536 KB occupied by the log file.
36789024 KB available on disk.

4096 bytes in each allocation unit.
244164351 total allocation units on disk.
9197256 allocation units available on disk.

Internal Info:
00 39 12 00 e8 dc 0f 00 50 d0 1c 00 00 00 00 00 .9......P.......
31 33 01 00 5c 00 00 00 00 00 00 00 00 00 00 00 13..\...........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

Windows has finished checking your disk.
Please wait while your computer restarts.
My System SpecsSystem Spec
06 Dec 2018   #10

Windows 7 Pro x64

SeaTools also passed.
My System SpecsSystem Spec

 Intermittent 7B on startup

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