Windows Server RC-4 Depreciation
RC-4 Depreciation KB ID 0001937 Problem Microsoft has begun a major security hardening programme for Active Directory domain controllers to address CVE‑2026‑20833, a Kerberos vulnerability that enables Kerberoasting attacks by exploiting weak RC4 encryption. If you run Windows Server domain controllers, you must prepare for the phased deprecation of RC4 throughout 2026. Enforcement becomes mandatory in July 2026, and environments...
This Computer Can’t Connect to the Remote Computer
Can’t Connect to the Remote Computer KB ID 0001936 Problem Seen when attempting to RDP to a remote computer. “This computer can’t connect to the remote computer. Try connecting again. If the problem continues, contact the owner of the remote computer or your network administrator.” Error details: Error code: 0x3 Extended error code: 0x7 Timestamp: 01/05/26 03:21:03 PM Solution: Can’t Connect to the Remote...
Joining Meetings with Teams SPEAKERS Muted
Teams Speakers Muted KB ID 0001935 Problem I’m not really sure when this problem started, my Microsoft Teams client (for mac) started joining meetings with my SPEAKERS and MICROPHONE muted. Doing any search yielded pages of people saying, “Did you mean your microphone is muted?” No, I didn’t! What happened was when I joined a meeting, I was greeted with this icon and both the microphone and speakers were muted, then...
Windows SSH ‘No Matching Key’
No Matching Key KB ID 0001900 Problem : No Matching Key Typically I see this problem on my mac or within various Linux distributions. I’ve covered extensively how to fix this on a mac in the following article. macOS – SSH Error ‘No Matching Exchange Method Found’ So when I saw the same question asked for a Windows client, I went and looked, and found some patchy information, so I thought I’d work it out and post it here...
Sysprep Validate (fails)
Sysprep Validate KB ID 0001934 Problem Seen whilst running sysprep on a Windows machine. System Preparation Tool 3.14 Sysprep was not able to validate your Windows installation. Review the log file at %windir%\system32\Sysprep\panther\setupact.log for details. After resolving the issue use Sysprep to validate your installation again. Solution: Sysprep Validate Fails Well it’s telling us to review that file, the easiest way to...
Directory Partition Has Not Been Backed Up
Directory Partition Has Not Been Backed Up KB ID 0001933 Problem Seen recently when running dcdiag. A warning event occurred. EventID: 0x80000829 Time Generated: xx/xx/xxxx xx:xx:xx Event String: This directory partition has not been backed up since at least the following number of days. You are seeing this error because dcdiag interrogated the event log and found an Event ID 2089 Log Name: Directory Service Source:...
Best Practice: Demoting a Domain Controller
Demoting a Domain Controller KB ID 0001932 Problem I was having a conversation with some colleagues this week, the conversation was about the placing of an RDS license server, and somebody had recommended putting it on the domain controller, I pointed out that this wasn’t a perfect idea, because in four or five year’s time somebody’s going to demote and take that to my controller off-line and forget all about the fact that...
Windows Server LBFO with Cisco IOS
LBFO with Cisco KB ID 0001931 Problem: LBFO with Cisco In Windows LBFO (Load Balancing Fail Over), commonly referred to as Teaming, is a method of combining multiple physical* NICs into one logical NIC (Team). *Note: It is possible to team virtual NICS in a VM, but redundancy and failover in a hypervisor environment are usually handled by virtual switches. Solution Common Sense Check and Tech Tips Remember, if you are not at the same...
Windows Server Cannot Rename NIC
Rename NIC KB ID 0001930 Problem: Rename NIC I had a strange problem. I needed to rename a NIC on one of my Windows 2025 Servers, but despite my selecting rename, nothing happened. Solution Where there’s a will, there’s usually some PowerShell, so launch an administrative PowerShell window and get a list of your network cards with the following command. Get-NetAdapter Then use the following command to rename the NIC of your choice. ...
VMware Alternatives
VMware Alternatives KB ID 0001927 Problem With uncertainty surrounding VMware’s future, many IT teams are actively reassessing their virtualisation strategies. On platforms like Spiceworks and Reddit, professionals are sharing their experiences and recommendations as they explore alternatives. VMware Alternatives What the Community Is Saying Proxmox VE is gaining serious traction. One user noted: “Already upskilling in Proxmox and...