Flashing log-in screen, LogonUI.exe

[Fallap]

During boot up today I was met with a flashing blue log-in screen, unable to choose any user, it just simply kept flashing for all eternity.

I'm able to operate in safe-mode.

Event-log:

- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
<Provider Name="Application Error" />

<EventID Qualifiers="0">1000</EventID>

<Level>2</Level>

<Task>100</Task>

<Keywords>0x80000000000000</Keywords>

<TimeCreated SystemTime="2014-12-03T14:53:58.000000000Z" />

<EventRecordID>292790</EventRecordID>

<Channel>Application</Channel>

<Computer>Philip-Pc</Computer>

<Security />

</System>


- <EventData>
<Data>LogonUI.exe</Data>

<Data>6.1.7601.17514</Data>

<Data>4ce79f70</Data>

<Data>USER32.dll</Data>

<Data>6.1.7601.17514</Data>

<Data>4ce7c9f1</Data>

<Data>c0000005</Data>

<Data>0000000000005357</Data>

<Data>1140</Data>

<Data>01d00f08f75a9485</Data>

<Data>C:\Windows\system32\LogonUI.exe</Data>

<Data>C:\Windows\system32\USER32.dll</Data>

<Data>352872a9-7afc-11e4-b7e4-742f684184e3</Data>

</EventData>


</Event>




Regards

- Fallap

 

[Mercury]

May just be a coincidence, but we started seeing this problem on a number of PCs in our environment this morning. Anybody else having this problem as well?

 

[ChrisDJ]

I have exactly the same issue as Fallap - started about 14:40 this afternoon UK time. Almost identical event log output.

 

[CptEagle]

Same problem here, about 16:00 swedish time (+1 ?)
A fix would be awesome...

 

[StormofThunder]

Same here! Extremity concerned, started happening near or at 16:00 GMT 00 (Portugal) as well. This is really weird.

 

[Fallap]

Same problem here, about 16:00 swedish time (+1 ?)
A fix would be awesome...

Interesting, I recieved this error at around 15:50 Danish time (+1) same time as Sweden.

 

[Mercury]

EDIT: Appears this is not working for most. BitDefender fix is on the way.

No clue what is going on, but we did manage to find a solution. Run the System File Checker tool.

Open administrator command prompt and run "sfc /scannow".

Use the System File Checker tool to repair missing or corrupted system files

 

[matts6887]

Well; for now; I would try this and see what happens: reboot into safe mode; log into windows if possible; then do a system restore back to before this started happening and see what happens: click start, programs, accessories, then system restore and see if you can find a restore point that is dated before this event started happening. Run the restore for that date and see if it resolves your issue. If not post back.

 

[SonicClang]

We started having the same problem this morning. Central Time, USA. No solution yet.

EDIT: We're trying Mercury's solution now. I'll post back.

 

[StormofThunder]

Also noteworthy is that before I could not open Windows explorer, no matter what. Then I rebooted and this started to happen.

 

[jtmoney528]

Same issue: Black screens with cursors and windows explorer crashing ..... this is on at least 40+ computers in a corporation.

 

[StormofThunder]

I did a sfc scannow and C:\Windows\SysWOW64\en-us"\ is corrupted

 

[StormofThunder]

Sounds like a massive virus/malware hit with software that we all have in common, to be honest.

 

[SonicClang]

We tried Mercury's solution and it did not fix the problem. I attached a screenshot. After running it, the user tried locking his computer and it locked up again.

 

[jtmoney528]

Anyone else here use BitDefender as antivirus?

 

[SonicClang]

Anyone else here use BitDefender as antivirus?

We are.

 

[phiquach]

It is bitdefender for whoever is using it.

Bitdefender update went out this morning and killed something.

did a restore to earlier date on one system. worked fine again.

once the update hit. broke

 

[StormofThunder]

Anyone else here use BitDefender as antivirus?

We are.

Yes, I do as well.

 

[Fallap]

Anyone else here use BitDefender as antivirus?

I use BitDefender as well

 

[Mercury]

BitDefender here too....yikes!