Technology Resources: Tools, Guides, and Tutorials
Browse the available free tools, tutorials, Excel resources, troubleshooting guides, and technical references.
Resources guides
Useful Windows Keyboard Shortcuts for Everyday WorkA practical Windows shortcut reference for switching apps, managing windows, screenshots, and everyday text editing.
Microsoft Word Keyboard Shortcuts That Save TimeLearn practical Microsoft Word shortcuts for formatting, editing, navigation, and document review.
Microsoft Excel Shortcuts for Faster Spreadsheet WorkUse Excel keyboard shortcuts to navigate cells, select data, edit formulas, and format spreadsheets efficiently.
PowerPoint Shortcuts for Editing and Presenting SlidesUseful PowerPoint keyboard shortcuts for building slides, aligning objects, and presenting with confidence.
How to Take a Screenshot in WindowsChoose the right Windows screenshot shortcut to capture the whole screen, a window, or a selected area.
How to Add Page Numbers in Microsoft WordAdd, position, and format page numbers in Microsoft Word, including documents with a title page.
How to Remove a Blank Page in Microsoft WordFind and safely remove the paragraph marks, page breaks, or section breaks that create a blank Word page.
How to Save a Word Document as a PDFExport a Word file to PDF and check page layout, links, and accessibility before sharing it.
Excel Formulas for Beginners: A Practical Starting GuideLearn Excel formula syntax, cell references, basic operators, and common troubleshooting checks with examples.
How to Use the SUM Formula in ExcelAdd numbers and ranges with Excel SUM, including multiple ranges and common causes of incorrect totals.
Excel IF Formula Explained With ExamplesUse Excel IF to return one result when a condition is true and another when it is false.
How to Use VLOOKUP in ExcelFind a value in the first column of a table with VLOOKUP and avoid approximate-match surprises.
Excel XLOOKUP: Exact Matches and Useful OptionsUse XLOOKUP to search a range and return a matching value without VLOOKUP's left-to-right limitation.
How to Count Matching Cells With COUNTIFUse Excel COUNTIF to count cells that match a word, number, wildcard, or comparison condition.
How to Add Values by Condition With SUMIFSum only the Excel values that meet a condition with SUMIF, including text and numeric criteria.
How to Remove Duplicates in Excel Without Losing DataSafely identify and remove duplicate Excel rows while preserving the original data and choosing the right comparison columns.
How to Freeze Rows and Columns in ExcelKeep headings visible while scrolling by freezing the top row, first column, or selected panes in Excel.
Create Your First Excel PivotTableSummarize a clean Excel dataset with a PivotTable and group values by useful categories.
SQL SELECT and WHERE: Retrieve the Rows You NeedLearn to select specific SQL columns and filter rows with WHERE conditions and safe examples.
SQL ORDER BY: Sort Query ResultsSort SQL query output with ORDER BY, multiple sort keys, and explicit ascending or descending order.
SQL GROUP BY and COUNT for Simple ReportsGroup SQL rows by a category and count records with GROUP BY, COUNT, and HAVING.
SQL JOINs for Beginners: Match Rows Across TablesUnderstand INNER JOIN and LEFT JOIN with keys, aliases, and checks for duplicated results.
SQL INSERT, UPDATE, and DELETE: Change Data CarefullyLearn the basic shape of SQL INSERT, UPDATE, and DELETE statements and how to review affected rows safely.
How SQL NULL Works in Filters and ComparisonsUnderstand why SQL NULL is not zero or an empty string and how to test for missing values correctly.
SQL CREATE TABLE and Primary Keys: A Beginner's GuideCreate a simple SQL table with named columns, data types, and a primary key while considering uniqueness and nullability.
How to Troubleshoot a Slow Windows ComputerUse a safe, ordered checklist to find common causes of a slow Windows PC before installing cleanup software.
Laptop Won't Turn On: Safe Checks to Try FirstCheck power, display, charging indicators, and connected devices when a laptop appears not to start.
Fix a Printer Showing Offline in WindowsCheck printer power, connection, Windows queue, and default-printer settings when a printer appears offline.
What to Do When Windows Update Is StuckSafely troubleshoot a Windows update that appears stalled without interrupting an active installation.
Windows Blue Screen: Record the Error and Find a Safe Next StepCapture the stop code and recent changes after a Windows blue screen, then use low-risk diagnostic steps.
No Internet on a Windows PC: A Step-by-Step CheckDetermine whether an internet outage affects one Windows PC or the whole network, then check connection settings.
Fix No Sound on a Windows ComputerCheck mute, output device, app volume, cable, and driver status when Windows audio stops working.
Free Up Disk Space in Windows Without Deleting Important FilesUse Windows storage settings to identify large files and safely reclaim disk space.
How to Start Windows in Safe ModeUse Windows Recovery settings to enter Safe Mode for troubleshooting, and return to normal startup afterward.
Show File Extensions in Windows File ExplorerTurn on file-name extensions to distinguish document types and spot misleading file names.
How to Manage Startup Apps in WindowsReview and disable nonessential startup apps in Windows while preserving security and device utilities.
When to Use Windows Network ResetUnderstand what Windows Network Reset changes and what to try before removing network configuration.
How to Find Your IP Address in WindowsFind your local Windows IP address in Settings or with ipconfig, and understand how it differs from a public IP.
How to Flush the DNS Cache in WindowsClear the local Windows DNS resolver cache with ipconfig /flushdns when troubleshooting name-resolution issues.
2.4 GHz vs 5 GHz Wi-Fi: Which Band Should You Use?Compare 2.4 GHz and 5 GHz Wi-Fi by range, interference, device compatibility, and practical placement.
How to Restart a Wi-Fi Router SafelyRestart a home router in the right order and distinguish a reboot from a factory reset.
Ethernet Connected but No Internet: What to CheckTroubleshoot a Windows Ethernet connection with no internet by checking cable, link, IP assignment, and router status.
How to Write Better AI Prompts for Everyday WorkA reusable prompt structure that gives AI tools clearer context, constraints, format, and a way to check results.
AI Prompt for Writing a Clear Professional EmailUse a fill-in prompt to draft a concise professional email while keeping facts, tone, and personal data under your control.
A Careful AI Prompt for Summarizing a DocumentAsk an AI tool to summarize supplied text with key points, decisions, open questions, and clearly marked uncertainty.
AI Image Prompt Basics: Describe the Result You NeedBuild clearer image-generation prompts with subject, setting, composition, lighting, intended use, and constraints.
How to Write a Useful SEO Title and Meta DescriptionWrite a clear page title and meta description that describe one page accurately and help searchers choose the right result.
How to Test a Website on Mobile and DesktopA practical responsive website checklist for navigation, text, forms, images, keyboard use, and real-device checks.
Why a Website Is Slow: Start With Images and Page WeightDiagnose a slow page by checking oversized images, unnecessary assets, network requests, and mobile loading behavior.
What an XML Sitemap Does and How to Check ItUnderstand XML sitemap basics, submit useful canonical URLs, and check that your robots rules allow important pages.
HTML, CSS, and JavaScript: How a Basic Website Fits TogetherLearn how HTML structure, CSS presentation, and JavaScript behavior work together in a small browser-based website.
Git Basics: Save and Review Changes in a ProjectUnderstand a beginner Git workflow for checking changes, staging files, making commits, and reviewing project history.
REST API Basics: Requests, Responses, and Status CodesUnderstand HTTP methods, JSON request bodies, response status codes, and safe ways to inspect a REST-style API.
Excel SUMIFS Formula: Sum With Multiple ConditionsUse SUMIFS to total values that match several conditions, with a sales region and payment status example.
Excel COUNTIFS Formula: Count With Multiple ConditionsCount spreadsheet rows matching multiple criteria with COUNTIFS and check the result against sample data.
Excel IFERROR Formula: Handle Formula Errors CarefullyUse IFERROR to return a chosen fallback when a calculation errors, while checking that the fallback does not hide useful warnings.
Excel Percentage Change Formula: Increase or DecreaseCalculate the relative change between an original and new value in Excel, with examples for increases, decreases, and a zero baseline.