Skip to content

CYBER904 Knowledge Base

Clear answers. Real screenshots. No tech-speak.

Short, tested walkthroughs for the everyday technology problems our clients run into — written so anyone on your team can follow them.

Browse by category

Microsoft 365

Microsoft 365 Group Mailbox Cleanup

Delete stored Group messages older than 12 months without changing how members receive email.

Article ID
KB-0001
Difficulty
Easy
Time required
5 minutes

All articles

14 articles

Microsoft 365

Microsoft 365 Group Mailbox Cleanup

Delete stored Group messages older than 12 months without changing how members receive email.

Article ID
KB-0001
Difficulty
Easy
Time required
5 minutes
Windows

Windows PC Is Running Slow

A practical order of checks that fixes most slow Windows computers without buying new hardware.

Article ID
KB-0005
Difficulty
Easy
Time required
30–60 minutes
Windows

Windows Update Fails to Install

Clear failed updates and repair the Windows update system when patches keep erroring out.

Article ID
KB-0006
Difficulty
Moderate
Time required
30–90 minutes
Printers

Printer Shows Offline and Won't Print

Bring a network printer back online and stop it dropping off again every few days.

Article ID
KB-0007
Difficulty
Easy
Time required
15–30 minutes
Networking

Wi-Fi Keeps Disconnecting on a Laptop

Stop repeated wireless drop-outs that interrupt Teams calls and knock Outlook offline.

Article ID
KB-0009
Difficulty
Moderate
Time required
20–40 minutes
Networking

VPN Won't Connect From Home

Work out whether the fault is the home network, the laptop or the account — and fix it.

Article ID
KB-0010
Difficulty
Moderate
Time required
20–45 minutes
Security

How to Spot a Phishing Email

A 60-second checklist your whole team can use, plus exactly what to do if someone already clicked.

Article ID
KB-0011
Difficulty
Easy
Time required
10 minutes
QuickBooks

QuickBooks Multi-User Error H202

Restore multi-user access when a workstation can see the company file but can't reach the host's database service.

Article ID
KB-0014
Difficulty
Advanced
Time required
30–60 minutes

Stuck? Let a CYBER904 expert handle it.

If you'd rather not do it yourself, we'll take care of it for you. Reach the team directly during business hours.