Temporary file from UsrClass.dat (sometime associated with NTUSER.dat)

UsrClass.dat{randomnumber}.TM.blf’s file filing up your user hard disk space ? It’s what and can we erase them is what I will talk today. (if you can’t run the diskcleanup wizard)

10-20-2016 12-16-40 PM.png

(or/and with those files)

10-20-2016 12-21-20 PM.png

A background; those files are temporary registry settings that are not yet wrote in UsrClass.dat. The OS to prevent some corruption write those files in the registry when it determine it’s ok to write them safely. The file act like a .TMP’s file.

UsrClass.dat contain : HKEY_USERS\<User SID>_Classes (HKEY_CURRENT_USER\Software\Classes) (source)

If your profile is fulled with those files it mean something broke the OS’s step. It’s a warning to check what happened to fix the real problem. We start by checking the Event Viewer;

In my case I used one file timestamp to search correctly the eventlog.

10-20-2016 12-13-05 PM.png

I was able to find it was caused by a scheduled restart, and that a service was giving an error.

10-20-2016 12-14-30 PM.png

 

For me after analyzing the why and the file I can safely remove those files. A note, running the diskcleanup tool would had been a lot more safier and faster, but in my case I wasn’t able.

 

Thanks !

 

Advertisements
This entry was posted in Uncategorized. Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s