Windows 10: Multiple mysterious problems, trying to find cause

@zbook here are the results of your first 6 instructions:

C:\Windows\system32>sfc/scannow

Beginningsystem scan. This process will take sometime.

Beginningverification phase of system scan.
Verification100% complete.

WindowsResource Protection did not find any integrity violations.

C:\Windows\system32>dism/online /cleanup-image /scanhealth

DeploymentImage Servicing and Management tool
Version:10.0.16299.15

ImageVersion: 10.0.16299.192

[==========================100.0%==========================]No component store corruption detected.
Theoperation completed successfully.



C:\Windows\system32>dism/online /cleanup-image /restorehealth

DeploymentImage Servicing and Management tool
Version:10.0.16299.15

ImageVersion: 10.0.16299.192

[==========================100.0%==========================]The restore operation completed successfully.
Theoperation completed successfully.



C:\Windows\system32>chkdsk/scan
The typeof the file system is NTFS.
Volumelabel is OS.

Stage 1:Examining basic file system structure ...
499456 file records processed.
Fileverification completed.
32862 large file records processed.
0 bad file records processed.

Stage 2:Examining file name linkage ...
349 reparse records processed.
582110 index entries processed.
Indexverification completed.
0 unindexed files scanned.
0 unindexed files recovered to lost and found.
349 reparse records processed.

Stage 3:Examining security descriptors ...
Securitydescriptor verification completed.
41328 data files processed.
CHKDSK isverifying Usn Journal...
36631464 USN bytes processed.
UsnJournal verification completed.

Windowshas scanned the file system and found no problems.
Nofurther action is required.

248955903 KB total disk space.
65075656 KB in 185451 files.
118672 KB in 41329 indexes.
0 KB in bad sectors.
625123 KB in use by the system.
65536 KB occupied by the log file.
183136452 KB available on disk.

4096 bytes in each allocation unit.
62238975 total allocation units on disk.
45784113 allocation units available on disk.

 

@zbook I performed a clean boot but I'm not sure how to analyze the boot. Is there a utility installed that can do this for me?

 

For clean boot:
How are the boots? Are they faster, slower, or the same?
How are shutdowns? Are they faster, slower, or the same?
How are hangs, freezing? Are they more frequent, less, frequent, or the same?
How is audio and video performance? Better, worse, same?

 

It was only slightly faster. I think I'm going to perform a clean install as suggested above. I really appreciate everyone's help and I will update the thread if everything starts working fine. *Smile