Secure Tech LA
Knowledge Base
Quick, practical answers for common Windows, Remote Desktop, Excel and Outlook issues.
Windows & Remote Desktop
Microsoft Excel
Device Help
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How can you turn off Function Lock (Fn Lock)?
All-in-One Media Keyboard: press the Fn and Caps Lock keys at the same time.
Keyboard with an Fn key: press and hold Fn, then press the Shift key above it.
Dell laptop: press the Fn and Esc keys together.
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How can you fix Outlook PDF Previewer Error?
Open Adobe Preferences and select your default PDF handler under the General category. In some cases, enable PDF thumbnail previews in Windows Explorer from the same settings area.
