
how to change screen resolution
To solve the screen resolution problem, you must first find the right way to set the device. 1. Windows users can enter "Settings → System → Display", select the recommended resolution, or adjust the zoom ratio as needed; 2. Multiple monitors need to click on the icon to set separately, and pay attention to the arrangement order and driver installation; 3. Mac users can enter "System Settings → Display", press Option and click "Zoom" to select the appropriate resolution, and pay attention to the interface support when connecting to external monitors; 4. When temporarily adjusting games or software, they should first match the resolution mode they support, and restore the original settings in time after use to ensure a clear and comfortable display effect.
Jul 11, 2025 am 03:27 AM
Outlook shortcut for new email
How to quickly create new emails in Outlook is as follows: 1. The desktop version uses the shortcut key Ctrl Shift M to directly pop up a new email window; 2. The web version can create new emails in one-click by creating a bookmark containing JavaScript (such as javascript:document.querySelector("divrole='button'").click()); 3. Use browser plug-ins (such as Vimium, CrxMouseGestures) to trigger the "New Mail" button; 4. Windows users can also select "New Mail" by right-clicking the Outlook icon of the taskbar
Jul 11, 2025 am 03:25 AM
How to select all
The core methods of selecting all operations in different scenarios include: 1. Use the shortcut keys Ctrl A (Windows) or Cmd A (Mac) to be suitable for most software such as Word, Excel and browsers, but you need to pay attention to the need to click once and then select all when the page has multiple optional areas; 2. Use the mouse to quickly select the entire text, which is suitable for text editors and web browsers, and double-click to select words; 3. Click the upper left triangle button in table software such as Excel or use the shortcut key to select all tables. The column or row number can be selected separately. If there are blank lines, Ctrl A must be selected twice; 4. Use Ctrl D or Cmd D to select the same keyword one by one, or use Ctrl Shift L or
Jul 11, 2025 am 03:25 AM
how to use Event Viewer
Use the Windows Event Viewer to troubleshoot problems by following the following steps: 1. Open the "System" or "Application" under "Windows Log" to filter the "Error" or "Serious" level to quickly locate the problem; 2. View the event ID and source fields, and combine it with network search to obtain solutions, such as Event ID41 represents a power problem, and 6006/6008 represents a system startup and shutdown; 3. Create a custom view to set filter conditions to save, so that it is convenient to view specific logs directly next time.
Jul 11, 2025 am 03:24 AM
what is an ISO file and how to use it
ISO file is a complete CD image file, full name ISO9660, used to store system installation, software distribution or CD backup. 1. It is not a compressed package, but a complete disk copy. It cannot be run directly, but can be recognized by specific software or written to a USB flash drive/disk; 2. Opening methods include browsing with WinRAR/7-Zip and mounting as a virtual optical drive (supported by Windows/macOS/Linux); 3. When installing the system, you need to use Rufus/Ventoy and other tools to write ISO to the USB flash drive and set it up to boot; 4. Other uses include running classic games, deploying server images, saving genuine CD content, etc., which are one of the common skills in technical work.
Jul 11, 2025 am 03:24 AM
Keyboard shortcut for find
Mastering the "find" shortcut key can significantly improve efficiency. The core answers and key points are as follows: 1. The general shortcut key for Windows/Linux is Ctrl F, and the Mac is Command F; 2. Use this shortcut key in the browser to highlight the matching content, and you can view the next one through Enter/F3 and find the previous one through Shift F3; 3. Office and text editors such as Word, Excel, and Notepad also support Ctrl F, and provide advanced functions such as wildcards, regular expressions, etc.; 4. The replacement operation can be completed in one step in Ctrl H; 5. It is recommended to check the help document to confirm the shortcut keys in different systems or devices. Proficient in using these techniques can help improve daily productivity
Jul 11, 2025 am 03:23 AM
how to update graphics driver
Regular updates to the graphics card driver can improve system stability and performance, especially suitable for gaming and graphic design users. 1. Confirm the graphics card model and view it through dxdiag or GPU-Z; 2. Use the device manager to automatically update, suitable for beginners but may not be the latest version; 3. It is recommended to manually download the official website driver, select the complete installation package and customize the installation as an administrator; 4. The update frequency depends on the purpose. Gamers recommend checking it once a month, and office users will be updated every two or three months. When problems arise, they should be updated in time.
Jul 11, 2025 am 03:21 AM
what is an operating system
The operating system is the basic software for managing hardware resources, running programs, and providing user interaction interfaces. It coordinates the relationship between hardware and software and is responsible for memory allocation, device scheduling, file management and multitasking. Common systems include Windows (suitable for office and gaming), macOS (Apple devices, suitable for creative work), Linux (open source, suitable for developers), and Android/iOS (mobile device system). The choice of ordinary users depends on the usage scenario, such as software compatibility, security and customization requirements. How to view system information: Use winver command for Windows, click on the machine for macOS, use terminal commands for Linux, and find the phone in settings. The operating system is the underlying tool for daily use,
Jul 11, 2025 am 03:16 AM
my computer won't turn on
If the computer cannot be turned on, you can check the following steps: 1. Check whether the power supply is normal, including plugs, sockets, power cords and battery power; 2. Confirm whether the screen is completely undisplayed and not the computer is not started, and you can judge the sound of the fan or hard disk; 3. Troubleshoot the monitor connection problem and try to connect to the external monitor; 4. Troubleshoot hardware failures, such as loose memory stick, abnormal motherboard power supply or power module problems, and seek professional help if necessary. Most cases can be solved through basic investigation without the need to replace the equipment immediately.
Jul 11, 2025 am 03:09 AM
how to open Task Scheduler
There are three ways to open the task scheduler. First, search through the Start menu, click the Start button and enter "Task Schedule Program" and select the corresponding result; second, use the Run dialog box, press Win R key to enter taskschd.msc and press Enter; third, find the task scheduler in the management tool through the control panel. These methods are suitable for Windows 10 and Windows 11 systems, and can eventually enter the task scheduler interface for task management.
Jul 11, 2025 am 03:08 AM
Excel shortcut for sum
Using Alt = is a shortcut to quickly sum it in Excel, which can significantly improve efficiency. The specific operations are as follows: 1. Place the cursor below the column of the required sum or to the right of the row; 2. Press Alt =, and Excel will automatically insert the SUM formula; 3. If the data is continuous, the sum can be completed directly. If there is a blank, only the data before the first blank will be summed; 4. You can select multiple cells first and then use shortcut keys to achieve summing of multiple rows and columns at the same time; 5. When more precise control is required, you can adjust the range with the arrow keys; 6. If the data contains hidden rows, you can only sum the visible cells by =SUBTOTAL (109, range) and customize the shortcut keys to improve efficiency.
Jul 11, 2025 am 03:07 AM
how to use Disk Cleanup
DiskCleanup can free up C disk space by cleaning up the system, updating residual, temporary files and recycling bin content, system restore points, and using the "Clean System Files" function. The specific steps are: 1. Check "Windows Update Cleanup" to delete the old update files, but it cannot be rolled back; 2. Check "Temporary Files" and "Recycle Bin" and other basic projects to clean up; 3. Carefully check "System Restore and Shadow Copy" to delete the old restore point; 4. Click "Clean System Files" to expand to scan more system-level garbage. Reasonable operation can free up several GB of space, which is suitable for confirming that the system is stable.
Jul 11, 2025 am 03:06 AM
how to find the serial number on a Mac
The serial number of Apple computer can be obtained by the following methods: 1. View in the system: Click the Apple menu → "About this machine" to view the 12-digit serial number; 2. Search through terminal commands: Open "Terminal" and enter the command system_profilerSPHardwareDataType|grep"SerialNumber" to obtain; 3. Check the outer packaging or purchase certificate: The label on the back of the packaging box, invoice or order record of the Apple official website; 4. Search online with the Apple ID account: Log in to the Apple official website account page, and check the serial number and warranty status of the associated device in the "Device" section.
Jul 11, 2025 am 02:49 AM
What parts do I need to build a PC
To assemble a PC, the necessary components include: 1. The CPU (processor) is responsible for computing, and the number of cores and compatibility with the motherboard is taken into account when selecting; 2. The motherboard is connected to all components and needs to match the CPU socket, chipset and size; 3. The RAM memory is recommended to be at least 16GB, and it is equipped with the speed and dual-channel configuration supported by the motherboard; 4. The GPU graphics card is used for graphics-intensive tasks, and the appropriate model is selected according to the resolution; 5. The storage is preferred to choose NVMeSSD, supplemented by HDD to increase capacity; 6. The power supply is 80 certified, with sufficient power and leave a margin; 7. The chassis is adapted to the motherboard size, taking into account both the heat dissipation and expansion space; 8. The cooling equipment includes CPU radiator and the chassis fan to ensure a good air duct. In addition, RGB lighting, additional fans or wireless modules are available.
Jul 11, 2025 am 02:46 AM
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