Today, while restarting from hibernation, my laptop (Dell N7010 running Windows 7 (64-bit)) was showing a blue screen (as in "of death") with several words shown in a large white font. I only saw it briefly then password screen appeared. The words I saw on the blue screen said "Your Computer is(?) Locked". Since I successfully used it (still am), I put the message in the back of my mind.
Several hours later, I put my laptop into hibernation again. When it came out, the password screen said that my computer was locked (attachment: "lock.gif"). That reminded me that I saw that this morning, too. But with no problem signing in, I had ignored it. Also, I watched closely but saw no blue screen with big "Computer Locked" message after this second hibernation.
I don't know what to make of this.
In between those hibernations, I Googled "booting windows 7 i saw blue screen with 'your computer has been locked' but my computer is NOT LOCKED" .
Bleeping was near the top of the hits. But Malwarebytes wouldn't let me go to the first hit because "Malwarebytes blocked a suspected bad URL or an unwanted program." Here's the URL: https://www.pcrisk.com/download-reimage; also, see attached "mal.gif".
So there's THAT on top of the blue screen with "Your Computer ... Locked" and twice finding "Locked" above the password box.
Clearly Malwarebytes Premium (3.1.1) is taking care of me, It's automatically kept up-to-date and last scan overnight showed nothing treacherous.
I also use Microsoft Security Essentials (1.259.858.0). But last scan was 10/12/17. I have it scheduled weekly to do full scan but apparently it never finishes. I have ignored it because Malwarebytes has my back. But I'll schedule for daily; see what happens. Maybe reinstall...
Finally, I have Windows Firewall running. It has an a box saying "Check for solutions to unreported problems" but NONE of the five items listed were reported to Microsoft. (See the problems at end of post.) Anytime I've ever clicked "Check for solutions", an info dialog pops up saying, "Problem reporting", "Checking for solutions". It just "finished", saying "Problem connecting to Windows error reporting service." That's always the message. I never get any info about solutions.
So it appears I don't have a problem with malware (but with programs supposedly protecting me from it!)
I guess this is one of those wait-and-see things.
Windows Firewall Problems found but not reported:
Problem Event Name: MpTelemetry 11/28/17
Problem Signature 01: 2152759308
Problem Signature 02: unspecified
Problem Signature 03: ScanFile
Problem Signature 04: 220.127.116.11
Problem Signature 05: Microsoft Security Essentials (EDB4FA23-53B8-4AFA-8C5D-99752CCA7094)
Problem Signature 06: unspecified
Problem Signature 07: unspecified
OS Version: 6.1.7601.2.1.0.768.3 (same for all other problems)
Problem Event Name: MpTelemetry 12/6/17
Problem Signature 01: Microsoft Security Essentials (EDB4FA23-53B8-4AFA-8C5D-99752CCA7094)
Problem Signature 02: 18.104.22.168
Problem Signature 03: TimeOut
Problem Signature 04: 1.1.14306.0
Problem Signature 05: fixed
Problem Signature 06: 4 / 2049+
Problem Signature 07: 5 / not boot
Problem Event Name: MpTelemetry 10/6/17
Problem Signature 01: 0x8007045b
Problem Signature 02: ValidateUpdate
Problem Signature 03: N/A
Problem Signature 04: 1.1.14146.0
Problem Signature 05: mpsigstub.exe
Problem Signature 06: 22.214.171.124
Problem Signature 07: Microsoft Antimalware (Beijing)
A problem caused this program (explorer.exe--see below) to stop interacting with Windows.
Problem Event Name: AppTermFailureEvent
Files that help describe the problem
Windows Backup failure (Yeah; Backup hasn't worked since 2011, so I wrote my own.)
Problem Event Name: WindowsBackupFailure