Windows 10: SYSTEM_DRV (Z:) - Appeared one day then it was gone

Has anyone else over this past weekend noticed if you went into your file folder, under "This PC", had noticed a new partitioned drive called SYSTEM-DRV Z: (or what ever letter it was assigned) when in fact, no one created a new partitioned drive, then when you rebooted, it was gone?

I was wondering why I saw it, I knew I never made any changes to my drive, I couldn't access it even though I am the administrator, couldn't even check its properties. I then Googled it, saw others had the same thing occur, just that day (Saturday afternoon on December 3), most of whom are Lenovo users, including myself. This drive was only 227 MB in size, and that was all the information I was able to get out of it.

I scanned the PC with ad-aware and Norton's - nothing showed up, so then I rebooted and it wasn't there since...
Very odd, wondering if anyone had the same changes occur to them.

:)

 

Windows 10 - SYSTEM_DRV (F

This virtual drive "SYSTEM_DRV (F" appeared on my system yesterday after an update. The screen dumps shown were similar to those shown here although I am running 8.1 (on a Lenovo desktop).

After reading the comments I went to "Windows update" to check the update history and found the page subject to a amber warning that updates were not completed. Clicked "complete" or similar and windows went into "restart", but instead of the message "installing
update nn of nn" the message was "working on updates"

After restarting "Windows update" was normal and the virtual drive "SYSTEM_DRV (F" was no longer shown. Have just turned on again today and it is sill gone.

 

"SYSTEM_DRV (F" mysteriously appeared

I got the same problem and i dont know what to do.. i am the admin and its denying my access.

I'm using Lenovo C2 desktop, 64bit, win8.1

 

When Windows installs it installs a small Hidden System Reserved partition in the front of the drive with no drive letter.
Some program might have added a drive letter to this partition and then Windows removed it on reboot.
Go to Start/Search and type diskmgmt.msc, right click the diskmgmt results and Run As Administrator. In the Elevated Disk Management window in the lower pane, you can see all the drives, and see the hidden System Drive.