When Windows cannot detect a second monitor, first check whether the physical connection is normal, including power supply, cable plug-in and interface compatibility, and try to replace the cable or adapter; secondly, update or reinstall the graphics card driver through the Device Manager, and roll back the driver version if necessary; then manually click "Detection" in the display settings to identify the monitor to confirm whether it is correctly identified by the system; finally check whether the monitor input source is switched to the corresponding interface, and confirm whether the graphics card output port connected to the cable is correct. Following the above steps to check in turn, most dual-screen recognition problems can usually be solved.

If you want to know the computer configuration, you can view it through three methods: Task Manager, System Information and Third-party Software. 1. Press Ctrl Shift Esc to open the task manager and switch to the "Performance" page to quickly view basic information of CPU, memory, disk and GPU; 2. Enter msinfo32 through Win R to open the system information tool to obtain a complete list of software and hardware and software and support export; 3. Use third-party software such as CPU-Z, GPU-Z or HWiNFO to detect the complete configuration in one click and most of them can be used without installation.

To display hidden files and folders, you can achieve it in the following three ways: 1. Click the "View" tab in File Explorer and check "Hidden Projects" to temporarily display hidden content; 2. Set the global display of hidden files through folder options, and the path is "View" → "Options" → "View" tab to select "Show hidden files, folders and drives" in the tab; 3. Advanced users can modify the Hidden item value to 1 through the registry to take effect permanently, and the registry must be backed up before operation. The above method is suitable for different usage scenarios and can be selected according to your needs.

The key steps to install PHP on Windows include: 1. Download the appropriate PHP version and decompress it. It is recommended to use ThreadSafe version with Apache or NonThreadSafe version with Nginx; 2. Configure the php.ini file and rename php.ini-development or php.ini-production to php.ini; 3. Add the PHP path to the system environment variable Path for command line use; 4. Test whether PHP is installed successfully, execute php-v through the command line and run the built-in server to test the parsing capabilities; 5. If you use Apache, you need to configure P in httpd.conf

To retrieve Bitcoins purchased years ago, you must first determine its storage location and retrieve the access key. The specific steps are as follows: 1. Recall and check the exchange accounts you may have used, such as Binance, Ouyi, Huobi, Gate.io, Coinbase, Kraken, etc., and try to log in or retrieve your password through email; 2. If Bitcoin has been withdrawn to your personal wallet, you must find the mnemonic, private key or wallet file. This information may exist in physical backup, electronic device or password manager; 3. After finding the key information, use the mainstream wallet app to select the "Recover Wallet" function and accurately enter the mnemonic or private key to synchronize the assets; Important tips: Do not disclose mnemonic or private keys to ensure the safe operation environment, and patiently and systematically check all

There are three ways to clean temporary files in Windows system. First, use the disk cleaning tool to open the system disk properties. Click Disk Cleanup to check the temporary files and delete them. Secondly, manually delete the content of the Temp folder. Press Win R to enter %temp% and enter and select all. Finally, you can run del/f/q%temp%* or cleanmgr/dC through the command prompt: for batch cleaning.

When encountering the "Unidentified network, nointernetaccess" problem, you should first check whether the network cable or Wi-Fi connection is normal, confirm that the interface is plugged in and the password is correct, try to disconnect and then reconnect; then reset the TCP/IP protocol and Winsock, run the netshwinsockreset and netshintipreset commands through administrator privileges and restart the computer; then check the network card driver, update or reinstall the driver through the device manager; finally temporarily close the firewall or third-party security software to test whether the network is restored.

The top ten popular digital currency trading platforms in the world include Binance, Ouyi OKX, gate.io, Huobi, KuCoin, Kraken, Bitfinex and Bitstamp. 1. Binance is known for its large trading volume, rich trading pairs, multi-trading mode, high security and user-friendly; 2. Ouyi OKX provides diversified derivatives, localized services, stable technology and Web3 layout; 3. gate.io has the advantages of strict project screening, many trading products, strong compliance, diverse financial products and simple interface; 4. Huobi has mainstream trading products, complete security guarantees, rich activities and localized operations; 5. KuCoin focuses on potential currencies, diversified trading tools, platform currency benefits and multi-language support; 6