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New WordPress posts won’t display on WordPress homepage (with Cloudflare caching enabled)

In my case this issue was happening because Bluehost enabled it’s own caching functionality (after I enabled Cloudflare), causing issues such as intermittently not displaying my latest WordPress published post on my sites home page

  1. Log in to your Bluehost Account Manager
  2. Click the Websites tab from the side navigation
  3. Locate the website you wish to disable caching for, and click SETTINGS then click on the SPEED tab in the following window
  4. Now disable CACHING CONTROL and click on the CLEAR ALL button under “Clear Cache”

Your newer posts should now hopefully display on your websites home page (consistently across all browsers)

Unable to access OS Drive to delete C-00000291*.sys CrowdStrike bluescreen

If your laptops SSD/NVME drive is Bitlocker encrypted and you’re not able to see/access the primary Windows 11 or 10 OS partition (typically the C:\ drive) in Windows Recovery (WinRE) whilst following Crowdstrikes remediation instructions at https://www.crowdstrike.com/blog/statement-on-falcon-content-update-for-windows-hosts/ (this will be apparent as you won’t be prompted for a Bitlocker key when you access the Command Prompt in the Windows Recovery Environment)

To get around this you’ll need to boot into your laptops BIOS to enable an alternative storage boot option

The below steps should be safe to complete if your laptop is not configured with multiple physical drives enrolled in a raided configuration

Depending on your laptops manufacturer/model the BIOS may be accessible via F12, F1, F2 or Esc

1. Once in the BIOS look for “Storage” or “Advanced” options and enable the opposite storage boot option to the one currently selected. The storage boot options you need to look for may indicate (AHCI and RAID) or (AHCI/NVME and RAID On). Select the opposite storage option to the one currently selected then save your BIOS setting changes and exit the BIOS and shut the laptop down

2. Now turn on the laptop again and boot into Windows Recovery again (this should happen automatically). If not let Windows 11 or 10 fully boot and wait for the bluescreen, the bluescreen/reboot cycle may need to be repeated for up to fives times or more before you’ll be prompted to enter Windows Recovery again, but once this happens, launch the Command Prompt from

“Advanced Options” > “Troubleshoot” > “Advanced Options” > “Command Prompt”

You should now be prompted to enter your Bitlocker Recovery Password (if you don’t have access to your Bitlocker Recovery Password then contact your domain administrator)

Once you’ve entered the Bitlocker Recovery Password your CMD dialog should auto launch to the X:\ drive

3. cd to %WINDIR%\System32\drivers\CrowdStrike or C:\windows\System32\drivers\CrowdStrike, and delete the C-00000291*.sys file as per Crowdstrikes instructions at https://www.crowdstrike.com/blog/statement-on-falcon-content-update-for-windows-hosts/ then type “exit” to exit the CMD prompt

4. Very Important: The final step is to enter your laptop BIOS again before Windows 11 or 10 fully boots to the login screen and revert the storage boot option changes made in Step 2 to it’s original setting

5. Save your BIOS setting change again and exit the BIOS once more then let Windows 11 or 10 boot. The Crowdstrike bluescreen/reboot issue should now be resolved

Approval buttons not working in SAP interface in Chrome

If you’ve found some SAP approval buttons are no longer working in Chrome the issue may be down to a feature implemented in Chrome 88 but only enabled by default in recent versions of Chrome (versions 115 and 116)

The origin-agent-cluster header isn’t a security feature but a http header (for browsers that support the origin-agent-cluster feature/flag) that web developers can implement to change the default behaviour for a web page, putting it into an origin keyed agent cluster so that it is grouped with other pages that have the exact same origin

Same site but cross origin pages will then be excluded from the agent cluster. Your browser will then decide (if it has the origin-agent-cluster-default enabled and if your device has enough resources) to allocate same site but cross origin pages their own process or seperate threads

This can benefit web based applications such as video conferencing or other web based applications that can be resource intensive so each “instance” of a cross origin page don’t impact another cross origin page running in the same browser

If you’re affected by the SAP approval issue, depending on what you use SAP for in your organisation you’ll find you’re no longer able to approve items like invoices, expenses, holidays etc.

No error messages appear when you click on the buttons normally used to approve the above, they just seem to be completely unresponsive in Chrome versions 115 and 116

Try disabling the chrome://flags/#origin-agent-cluster-default flag in Chome and restarting your browser and this will most likely resolve your issue

You may need to go back and disable the chrome://flags/#origin-agent-cluster-default flag later if Chrome is updated in the future (I can’t confirm this as I already have the latest version of Chrome installed)

I found the workaround for the issue here but it wasn’t very well documented https://answers.sap.com/questions/13949753/enterprise-portal-problem-after-chrome-115116.html

More information here: https://web.dev/origin-agent-cluster/#when-to-use-origin-keyed-agent-clusters

Edge has yet to enable its equivalent edge://flags/#origin-agent-cluster-default flag by default so Edge can be used as an alternative browser if you don’t want to disable the chrome://flags/#origin-agent-cluster-default flag in Chrome

Here’s a related Oracle Enterprise issue

Smart View cannot be started in the Samsung Flow Windows 10 app though Samsung Flow indicates “Device connected”

Like an issue I described in a previous post this issue only appears when you resume your PC/laptop from a hibernated state

If you’re affected by this problem the Samsung Flow Windows 10 app will attempt to connect to your mobile phone after you click on the “Smart View” option but will then display 4 spinning coloured dots and finally fail to connect to your phone

If you restart your laptop then launch Samsung Flow and try the “Smart View” option in the app you should then be able to reconnect to your mobile phone

Teamviewer Bomgar remote desktop sessions hangs or disconnects

If your Teamviewer, Bomgar or any other remote desktop service is hanging or disconnecting the fix may be as simple as switching off Wifi channel optimisation on the broadband router your target computer is connecting to the internet on

This was required to resolve remote desktop session interruptions to a user with a Virgin Media Hub 3 device in their home

Uncheck the box highlighted in red below and “Apply Changes” to resolve the issue

Wifi Channel Optimization setting to disable

IPTV SAP Announcements won’t appear in VLC on Windows 10

I found the resolution to this issue last year (May 2019) but didn’t think to do a write-up at the time. Another issue involving WireShark refreshed my memory of this IPTV VLC problem on Windows 10 which is why I’m only drawing up this guide now

If you run into this problem you’ll be able to double click on “Network streams (SAP)” in VLC (like you had been able to on Windows 7), however when you try to open your IPTV channel list from the “All” dropdown nothing appears i.e. no channels appear for selection…

No SAP IPTV channels appear for selection in VLC when SAP steams is clicked on and the "All" dropdown is opened
No SAP IPTV channels appear for selection

To troubleshoot this I monitored Wireshark captures in Windows 7 and compared them to Windows 10 with VLC running and found port 9875 opens on Windows 7 to listen for SAP announcements. This traffic however is dropped by the Defender firewall in Win 10 (confirmed by checking the Win 10 Defender Firewall logs)

Once VLC finds and lists all multicast IPTV streams available and the user selects an IPTV channel, port 5000 opens on Windows 7 to actually play the IPTV stream for the channel chosen. Traffic on port 5000 however is also dropped by Win 10’s Defender firewall

You may have spotted you can still connect to the IPTV stream via udp://@<encoderIP>:5000 in VLC (which confirms the stream is being broadcast) but the IPTV channels themselves aren’t being advertised in VLCs SAP announcements on Win 10

The key here is to understand that Win 10’s Defender firewall is lot stricter in the types of traffic its accepts by default

If there’s no rule in place for ports 9875 and 5000 Win 10’s Defender will drop that traffic. You can test this by disabling Defender then starting VLC again and the IPTV channel list will appear fine on Win 10 (just like it does in Windows 7)

So you’ll need to allow incoming traffic on ports 9875 and 5000 via Group Policy to allow traffic on those ports through (or open them yourself in Defender if your PC isn’t joined to a domain)

Can’t get Your Phone Companion to connect to Windows 10

If you run into this issue there’s a simple fix to re-initiate the connection to Windows 10 if for any reason you’ve had to reinstall the Your Phone Companion app on your phone or had to reinstall the Your Phone app on Windows 10

If your phone indicates it’s “Reconnecting to PC” but never connects the below instructions should fix this issue

Go into Settings – Apps – Your Phone Companion

Select the Storage option then click on Clear Data

Launch the Your Phone Companion app once more and it should now be able to connect to your Windows 10 PC again

The above instructions may differ depending on phones manufacturer

The Blog of Martin Birrane