Knowledge Base

High CPU – “Windows Defender Antimalware Service Executable”

Fix Add extension exclusions:Settings → Virus & threat protection → Exclusions Disable real-time protection temporarily.

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How to Improve Windows Performance Using Built-in System Commands

Boost Windows Performance with SFC & DISM Commands Is your Windows PC running slower than usual? Before installing third-party tools, you should try the powerful diagnostic and repair…

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Linux – Ubuntu Desktop/Server (CLI)

Server Not Booting After Update – “Initramfs Prompt” Cause Broken kernel Disk full Fix Check disk: df -h Remove old kernels: apt-get remove linux-image-5.x.x Rebuild initramfs update-initramfs -c…

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RDP Not Connecting in Windows Server 2022

Fix Enable RDP SystemPropertiesRemote.exe Allow firewall rule: netsh advfirewall firewall add rule name=\"RDP\" protocol=TCP dir=in localport=3389 action=allow Check domain firewall policies.

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Email Not Sending from WordPress

Cause Missing SMTP Hosting block SPF/DKIM fail Fix Install WP Mail SMTP plugin Setup SMTP (SendGrid / Gmail SMTP / Mailgun) Verify SPF: v=spf1 include:sendgrid.net -all Enable DKIM…

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External Emails Not Delivering – “Relay Access Denied”

Cause Postfix not configured as the correct relay Wrong mydestination / relayhost setting Resolution Edit /etc/postfix/main.cf myhostname = mail.example.com myorigin = /etc/mailname mydestination = localhost relayhost = Restart:…

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Outlook cannot connect to Exchange (“Disconnected” Status)

Cause Autodiscover DNS missing Wrong Outlook virtual directory URL Authentication disabled Resolution Check DNS autodiscover..com → public IP Run: Test-OutlookConnectivity Reset virtual directory Reset-AutodiscoverVirtualDirectory -Identity \"Server\\Autodiscover (Default Web…

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Emails Marked as Spam in O365 Despite Correct SPF/DKIM/DMARC

Cause Low IP reputation Bulk sending Missing ARC seal for forwarded mail Fix Validate all authentication: https://mxtoolbox.com Enable ARC: Admin Center → Email authentication → ARC → Enable…

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HOW TO REMOVE BLOATWARE FROM WINDOWS USING WINDOWS TERMINAL (ADMIN)

Remove Windows Bloatware Debloat Windows 10 Debloat Windows 11 Windows Terminal Bloatware Removal PowerShell Debloat Script Speed up Windows Windows optimization Remove pre-installed apps Windows debloater If you’ve…

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Apple iOS (iOS 17/18)

iPhone Not Sending/Receiving Emails (IMAP/Exchange) Fix Remove and re-add the email account Ensure: IMAP Port: 993 SMTP Port: 587 SSL = ON Reset network settings: Settings → General…

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Critical Error – White Screen of Death

Cause Plugin conflict Theme issue PHP version mismatch Fix Enable debug: define( \'WP_DEBUG\', true ); Rename /wp-content/plugins to disable all plugins Switch theme to Twenty Twenty-Five Ensure PHP…

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Emails Going to Queue – “Connection Timed Out”

Cause SMTP port blocked DNS issue Reverse DNS missing Resolution Test SMTP outbound telnet gmail-smtp-in.l.google.com 25 Add PTR record for your IP → mail.example.com Restart postfix.

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