大肉大捧一进一出好爽视频动漫 ,99久久无码一区人妻a黑国产馆,free性欧美精品videos

Article Tags

Home

Technical Articles

Computer Tutorials

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

Sum Excel shortcut keys

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

mac serial number

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

how to view crash logs in Windows

Use the event viewer to view the crash log: Press Win R to enter eventvwr.msc, click "Windows Log" → "System" or "Application" in turn, filter the error level log, pay attention to event ID 41, 6008, etc., view the time, error code, module name and other content in the detailed information, and pay attention to keywords such as "BugcheckCode" and "Causedby". 2. View the memory dump file (dump file): Go to the C:\Windows\Minidump or C:\Windows\Panther directory, use the WinDbg tool to open the dump file and enter the !analyze-v command to analyze, and follow the prompts in the analysis results.

Jul 11, 2025 am 02:45 AM

How to partition a hard drive?

Is it necessary to partition hard disk? The answer is based on demand. If you have a lot of data to manage, want the system to be separated from the data or want to install dual systems, partitioning is necessary. The benefits include that the data is not affected when reinstalling the system, the file classification is clearer, and the flexibility of multi-system startup; before partitioning, you must back up important data, confirm the hard disk type (MBR/GPT), and check the available space; the partitioning steps using Windows' own tools are: Open disk management → Right-click the target area → Compress volume → Enter the compression size → Create a new simple volume → Set the disk letter and format; third-party tools recommend MiniToolPartitionWizard, EaseUSPartitionMaster and GParted, suitable for advanced skills

Jul 11, 2025 am 02:32 AM

Tutorial Hard disk partition

how to disable firewall

There are security risks when closing the firewall, and it is recommended to operate only if necessary. Windows users can turn off through the "WindowsDefender Firewall" setting in the control panel, select the dedicated and public network settings, and click "Close Firewall"; macOS users can unlock and close the firewall in "Privacy and Security". Linux systems use ufw's executable sudoufwdisable, while firewalld can be stopped and disabled by the systemctl command to stop and disable booting. After closing, you should avoid long-term exposure to the public network environment, turn on it in time after the test is completed, and priority should be given to configuration rules rather than shutting them down completely to ensure safety.

Jul 11, 2025 am 02:27 AM

firewall

Using Windows keyboard on Mac shortcuts

Operating on a Mac using a Windows keyboard allows you to quickly adapt by replacing the keys. 1. The Command key replaces the Windows key, which realizes copy-paste (Command C/V), Select All (Command A), Close window (Command W), etc.; 2. The Alt key corresponds to the Option key, which is used to enter special characters such as backticks and Euro symbols; 3. The function key behavior can be adjusted, and the brightness volume needs to be adjusted by default with the Fn key. It can also be set to directly use F1-F12 in the system settings; 4. Some missing keys can be replaced by key combinations, such as the Command arrow keys for Home/End, Shift Command 4 for screenshots, and you can also install tools to customize them.

Jul 11, 2025 am 02:13 AM

java programming

How to fix 'Controlled folder access blocking app' issue in Windows?

If Windows' "Control Folder Access" intercepts normal applications, you can try the following methods to solve it: 1. Add the application to the allow list to release the program; 2. Check for malicious behavior or false alarms; 3. Advanced users can temporarily disable the function through Group Policy; 4. Update or repair the application to reduce misjudgement. These methods can solve problems while remaining safe.

Jul 11, 2025 am 02:09 AM

how to fix mac mouse keeps disconnecting

The problem of disconnecting the Mac mouse can be solved by the following methods: 1. Check the battery level and ensure good contact, and replace the new battery if necessary; 2. Reset the Bluetooth module, cancel the pairing and reconnect; 3. Check signal interference, adjust the receiver position or turn off nearby Bluetooth devices; 4. Update macOS or install a third-party mouse driver; 5. Turn off the Bluetooth power saving option in the energy-saving settings and adjust the mouse parameters. If the above steps are invalid, it may be that the Mac Bluetooth module is faulty and needs to be sent for repair.

Jul 11, 2025 am 02:08 AM

how to fix my mouse feels floaty

The main solutions for the mouse to feel "float" or not following the hand include: ① Adjust the mouse sensitivity, the office recommends 800~1600DPI, and the game can be adjusted as needed; ② Check the surface of the mat and use a solid matte material to avoid reflection or complex patterns; ③ Clean the sensor, use a cotton swab to gently wipe the photoelectric window area at the bottom; ④ Update the driver, turn off the Windows "Improve pointer accuracy" option and install the latest official driver. The above steps can basically solve most problems. If it still cannot be improved, it may be that the hardware is aging and you need to replace the mouse.

Jul 11, 2025 am 02:07 AM

How to restore the missing volume icon in the Windows taskbar?

The volume icon is not visible can be restored by the following methods: 1. Check the taskbar settings and set "Volume" to "On"; 2. Restart or start "WindowsAudio" and related services; 3. Advanced users can modify the registry to enable the volume icon; 4. Finally, try restarting the computer. Most cases can be solved in the first two steps, pay attention to details during operation to ensure accuracy.

Jul 11, 2025 am 02:02 AM

how to fix mouse drift

The mouse drift problem can be solved by the following steps: 1. Clean the mouse sensor, turn off the power and wipe it gently with a cotton swab to avoid dirt interference; 2. Replace suitable surfaces such as special mouse pads to improve tracking stability; 3. Update or reinstall drivers to ensure software support; 4. Troubleshoot third-party software conflicts and uninstall potentially influencing tools. In most cases, it can be improved by cleaning and replacing the usage environment. If it is invalid, hardware replacement is considered.

Jul 11, 2025 am 02:00 AM

repair Mouse drift

How to fix Hyper-V not working in Windows 10?

When Hyper-V cannot work properly on Windows 10, you can troubleshoot and solve the problem by following the steps: 1. Confirm that the system is Pro, Enterprise or Education version, and make sure that the CPU supports virtualization technology and is enabled in BIOS/UEFI; 2. Manually enable the Hyper-V function, install relevant components through the control panel or PowerShell command and restart; 3. Check and uninstall possible conflicting software such as VMware or VirtualBox, turn off Sandbox and other Hyper-V-based functions, and confirm that the "Hyper-V Virtual Machine Management" service is running; 4. Use sfc/scannow and DISM tools to repair

Jul 11, 2025 am 01:54 AM