Archive for the ‘Troubleshooting’ Category

KB4561600 or KB4560960 ‘Breaks’ Printing

On several machines after the automatic installation of Windows updates KB4561600 and KB4560960, printing to some, but nit all, printers no longer works. It seems when you try to print, the application closes immediately and printing does not take place. The simple solution is to locate the most recent drivers, delete the existing printer and re-install using the new drivers.

Hyper-V Missing VMs

Over the past 6 months I installed 4 Server 2019 Hyper-V hosts for various clients. After several months with no problems, following a reboot, all running VM’s completely disappeared from the Hyper-V management console and were not accessible from the network using management tools, file shares, remote desktop, or even pings. Oddly, shut down or saved VM’s were present.

When this first happened I was shocked. The VHDX files were all present so I could create a new VM, but that didn’t seem practical. Googling showed that this can happen if the Hyper-V Virtual Machine Management service did not start, but in my case it had. I tried restarting the service, the VM’s instantly reappeared, and were in a running state with boot up almost complete.

This issue over the coming months started happening on other 2019 servers and after every reboot, planned or due to a power outage, I had to connect to the host and restart the Hyper-V Virtual Machine Management service.

Further Googling this issue brings up suggestions of corrupt VM configuration files, granting “NT Virtual Machine\Virtual Machines” the “logon as a service right”, doing the same with group policy, and other suggestions, but where restarting the service would resolve in every case I assumed there was not a configuration issue.

In the end setting the Hyper-V Virtual Machine Management service start up type to “Automatic (delayed start)” resolved the problem on all machines, though it resulted in a slightly longer boot time for the VMs.

All of thee servers worked fine for a few months so I assume the problem was due to a Windows update but to date I have found no actual cause. Also, I can confirm this only occurs on my 2019 Hyper-V hosts. There are no issues with Server 2016 or earlier servers.

Hyper-V restart

Adobe Acrobat opens, then closes

I had a client where Adobe Acrobat XI Standard, on Windows 10, worked flawlessly for several years, but recently documents would open and then after a couple of seconds close with no warning.  Reinstallation and reactivating did not solve the problem nor did many Internet search results such as registry edits.

What did work was to open Adobe and very quickly, before it closed, click  “Help” on the menu bar and then select “Check for updates”.  It did find an update, download, and install.  It worked fine after that.  I suspect a compatibility issue with a recent Windows update may have caused the problem.

100’s of Windows Commands

This is a must have pdf reference file: 

An amazing, free, current, searchable, compilation of hundreds Windows commands with explanations, syntax, and examples of their use.  And, it’s free !

https://www.microsoft.com/en-us/download/details.aspx?id=56846

Windows Commands

An Authentication error has occurred

It seems recently many users are receiving an error logging into Remote Desktop Servers (Terminal Servers) from off-site. The error reads:

KB4103725

An authentication error has occurred.
The function request is not supported.
Remote computer <ServerName>
This could be due to CredSSP encryption oracle remediation.
For more information, see https://go.microsoft.com/fwlink/?linkid=866660

This is a result of a March 13th update. The previous error message was shorter, but an Apr 17 update elaborated the error message to read as above.

The link explains how to resolve using group policy but the simple fix, as of May 8th, is to apply the KM4103725 monthly rollup update. This will require a reboot on most servers, but should resolve the problem once complete.

 

Windows 10 Update Fails error code 0xc1900208

It seems Windows 10 Update fails sometimes, especially with the Fall Creators Update.  It continuously wants to install, you approve, it runs, and fails, often with error code 0xc1900208.   

In troubleshooting I have found most of the time it will install if you click the “Update now” button form the Creators Update Web page.  It seems to check for compatibility, make any adjustments, then Install.https://www.microsoft.com/en-us/software-download/windows10 

Should that fail to work, you can download the Windows 10 Update Troubleshooter, which will troubleshoot, and offer to repair any issues found.  There is also a troubleshooter for Win  7 and 8.https://support.microsoft.com/en-us/help/4027322/windows-update-troubleshooter 

However, I also recently read about an issue with attached USB drives oddly causing the update to fail.  Recently,  on a PC on which I tried all of the aforementioned options, and had no attached USB devices, I discovered a DVD in the drive.  Once ejected the update installed without a problem.  This strikes me as very bizarre, but perhaps the update searches other available drives for some reason. 

Therefore; I recommend if having issues with Windows updates, try disconnecting any USB devices such as external drives, thumb drives, phones which may be charging, and possibly even USB printers, and don’t forget to check the DVD tray, just in case.

Adobe Strange Characters

Have you ever opened an Adobe document and been surprised to see hieroglyphic-like, unrecognizable,  characters?

Adobe garble

Having seen this a few times and having found dozens of solutions on the internet, some of which seem rather complex, I did a little tinkering.  It seems the common denominator is one simple change; allowing “document fonts”.   I confess I have not run across this with Adobe Acrobat Reader, but if Adobe Standard or Pro, there will be an Adobe “Printer”.  To resolve the problem……….

 

  • Windows 7/8: Open Control Panel and then Devices and Printers Right click on the Adobe “printer” and choose Printer properties.
  • Windows 10: In the Cortana Search box type printers and click enter, which should open the Printers and Scanners window. Click on the Adobe “printer” and 3 buttons should appear, click manage, then Printer Properties
  • Click the “Preferences” button near the bottom
  • Choose the “Adobe PDF Settings” tab
  • Uncheck the box “rely on system fonts only, do not use document fonts”
  • Click Apply, OK, and close all windows
  • This requires a restart to take effect.

 

 

C:\Windows\Temp filling with .cab files

On several systems over the past year I have seen the C:\Windows\Temp folder filling up with large .cab files generated by the system, on a semi-regular bases.  This continues until there is no available drive space and the system becomes unusable.

The short term solution is to just delete all of the files but the problem returns after weeks or months, depending on the initial free drive space.

It seems this is caused by a large log file within the C:\Windows\Logs\CBS folder.  To resolve I created a folder C:\Windows\Logs\CBS_Archive and moved all  CbsPersist_file_number.log files, older than 10 days, to the archive folder.  This seems to have resolved the issue.

15 Minute Beeps

I was asked to look into a beeping in a server room which no one could find. 

It was understandably difficult as there were three server racks with modems, routers, switches, servers, PCs, UPSs, CCTV, and audio equipment.  To add to that they were single beeps, quite wide spread apart, and within a noisy, concrete room.  I determine after a little while they were single beeps and exactly 15 minutes apart.  Typically first suspicions are the UPS units, but 15 minutes is not typical of APC UPS devices.  To make a long story short, it turns out in a far corner where 2 fiber internet connections entered there were small UPSs units supplied by the service provider.  One of the UPS units showed a failed battery.  Being behind the open steel door, no one had seen the light. 

This seems like a trivial post and an obvious solution but I am posting as there are many forums on the Internet with people not being able to locate a device creating a beep every 15 minutes.  This is common with FIOS, Verizon, and Bell equipment.  One story goes as far as to explain a fellow turning everything off in the server room, one device at a time, every 15 minutes, till everything was shut down and unplugged, but could still hear the beeps.

Fibre1

DFSR Event ID: 2147485861

It seems Server Essentials and possibly others will often show in the daily report a DFSR Event ID: 2147485861 error. There is also a corresponding Warning Event logged in the DFS Replication log (sub-folder of Applications and Services Logs) of the event viewer with Source DFSR and Event ID 2013, followed by an Event ID 2212. This is most often caused by a dirty shutdown.

image

There are numerous articles on the Internet explaining how to resolve this, but I was told they were not clear to some readers. So, hopefully to clarify:

Firstly open Regedit and locate the key below, and verify it is set to 1. If not change it to 1.   (Note: you should always backup the registry before making any changes)

HKLM\System\CurrentControlSet\Services\DFSR\Parameters\StopReplicationOnAutoRecovery

Then in the error message within the report locate the command as highlighted in the image above, but cut and past it from your server report as it will have the correct volume GUID. Make sure it is all one line. You may want to use Notepad to reassemble if broken in the report. You need to use an elevated command prompt to run this.

If you run the command with the wrong GUID it will display; “No Instance(s) Available”.

If successful your command window should look similar to this:

image

This should resolve the problem, but it may return at some point in the future.  The Windows Server 2012 Essentials Build document (wiki article) suggests to prevent this in the future, after running the command successfully, change the aforementioned registry key from 1 to 0.  Doing so enables DFS Replication automatic recovery.

http://social.technet.microsoft.com/wiki/contents/articles/13620.windows-server-2012-essentials-build-document.aspx#DFSR_Error_in_Health_Reports

Tag Cloud