Fix office IT problems
yourself, from Hinet's real cases
Practical fixes for the IT issues SMEs hit most — email, printers, shared drives, VPN and Microsoft 365 — written from 4,800+ real support tickets. Still stuck? Our engineers can take it from there.
Browse by problem
9 categories built from real IT support tickets, ordered by how often SMEs hit them
Email & Hosting
Bounces, blacklists, full mailboxes, hacked accounts, Outlook errors
2 guidesPrinter & Scanner
Printing fails, scan-to-folder, printers dropping off the network
Coming soonFile Share & NAS
Mapped drives, file access, Qsync and OneDrive sync issues
Coming soonVPN & Network
VPN won't connect, slow internet, unstable Wi-Fi
1 guideMicrosoft 365 & Office
Office licensing, Excel crashes, Adobe and PDF issues
Coming soonAccount & Access
Permissions, onboarding/offboarding, passwords and MFA
Coming soonBackup & Monitoring
Backup verification, the 3-2-1 rule, NAS capacity
Coming soonHardware, CCTV & UPS
PCs that won't boot, CCTV not recording, UPS batteries
Coming soonWebsite & Domain
WordPress update errors, DNS and domain transfers
Coming soonLatest guides
Every guide has numbered steps, summary tables and an FAQ
Email bounced with 550 5.7.1? How to fix it
A blacklisted IP or incomplete SPF/DKIM/DMARC — 6 steps to find the cause and get unblocked for good.
Read guide →
Email hacked and sending spam? What to do first
Resetting the password isn't enough — remove the forwarding rules attackers leave behind and watch for fake bank-change emails.
Read guide →
VPN (FortiClient) won't connect? Check this first
One person or many? Tried a hotspot? 6 steps to separate network, account and firewall problems — plus what errors -14 and -7200 mean.
Read guide →How we write these guides
Every guide comes from work our team actually does — not rewritten from other websites
Built from 4,800+ real tickets
Steps are ordered by how often each cause shows up in real SME support work, not by theory.
Written and reviewed by practitioners
Written by a Managing Director with 20+ years in IT and reviewed by Hinet's systems engineers.
Client data stays private
Real cases without client names, IPs or internal details — and updated as technology changes.
Can't find it, or still not fixed?
Describe the symptom briefly. Hinet's engineers will help diagnose it and get back to you within 1 business day.
- Supporting Thai businesses since 2004
- Email, network, servers and Microsoft 365 — all covered
- Free initial assessment, no obligation