A Guide to Computer Hardware Components and Their Functions
Learn what the main parts inside and around a computer do, how they work together, and what to check before buying or upgrading hardware.
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15 guides
Access a Departed User's OneDrive with Audit and Handback Controls
Recover authorised business data without taking over the person's identity: define purpose, preserve the retention window, grant accountable temporary access, transfer only what is needed, and remove that access when the handback is complete.
The Boeing Distribution LockBit Incident: A Scope-First Supplier-Risk Lesson
Separate the confirmed 2023 Boeing Distribution incident from speculation, then turn its Citrix Bleed entry path, environment boundary, response evidence, and supplier dependencies into practical lessons.
China's 1.2-Tbit/s Research Backbone: What the ‘World's Fastest’ Claim Actually Meant
Revisit the 2023 FITI announcement without the superlatives: what 1.2 Tbit/s described, how a research backbone differs from household internet, and how to compare network-speed records honestly.
Choosing an Email Service: Start with Ownership, Administration, and Exit
Choose a mailbox service by deciding who owns the address, who protects the domain, who must administer it, how people will work, and how you could leave—before comparing storage, apps, or promotional prices.
Diagnose Outlook Search and Offline Address Book Freshness Without Resetting Everything
Find out whether the missing result belongs to mail search, a local index, the live directory, an offline address-book snapshot, personal contacts, or recipient suggestions—then correct the smallest proven fault.
Diagnose SMTP Delivery Without Weakening Transport Security
Find the last verified handoff, interpret the complete SMTP response, and test one controlled path before changing mail flow—without disabling TLS, MFA, authentication, or domain protection.
Exchange Online Archive Is Not Backup: Choose the Right Retention and Recovery Tool
Decide whether you need more mailbox space, records retention, legal preservation, deleted-item recovery, or a recoverable point in time—because an archive mailbox solves only some of those problems.
Mastering Email Access: A Beginner Guide to Webmail and Email Clients
Choose webmail, an email application, or both; add an account through its secure provider sign-in; and diagnose common setup and synchronisation problems without guessing.
Microsoft 365 Migration: Preflight, Cutover, and Cleanup That Actually Close the Job
Turn a Microsoft 365 migration into an accountable change: inventory the real workload, prove identity and DNS control, pilot the chosen method, validate user outcomes, and decommission the source only after acceptance.
Quick Tips for Regular Software Updates
Keep computers, phones, applications, browsers, and network devices current with a routine that protects data, scales testing to risk, verifies installation, and keeps a recovery path.
SARS e@syFile Employer Troubleshooting With Backup-First Decisions
Protect employer records, identify whether the fault is installation, access, payroll import, reconciliation, online handoff, or submission status, and repair only the failed stage.
SQL Server Maximum Memory Without Starving Windows: Size, Change, and Verify It
Set a defensible SQL Server memory ceiling from real host and workload evidence, preserve Windows and operational headroom, stage the change, and verify more than one counter.
What DMARC Actually Entails—and How to Choose the Right Provider
Understand the continuing work behind DMARC, decide whether to run it yourself or get help, and evaluate providers without buying a dashboard, promise, or policy you cannot safely operate.
Windows Domain Time on the PDC Emulator: Configure, Verify, and Recover the Hierarchy
Find the real forest-root time authority, prove its current path, configure approved upstream sources without breaking domain hierarchy, and verify the result beyond a one-off resync.
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