There are three ways to change the default PDF opening method to your desired application: through File Explorer, System Settings, or Control Panel. First, you can right-click on any PDF file and select "Open with" and check "Always use this app"; secondly, enter the "Default Application" setting through [Win I] and specify a program for .pdf; you can also manually associate it through the "Default Program" function of the control panel. If it is still changed after setting it, you need to check whether the security software has reset the association, and make sure that the PDF reader's own settings have been set to default to avoid conflicts between multiple PDF software and lead to unstable association.

1. Turn on the reading mode of UC Browser to bypass copy restrictions. Click the book icon and long press the text to copy; 2. Disable JavaScript to remove script protection. Go to settings to turn off this function and refresh the page; 3. Use the webpage snapshot function to load content in a simplified form, peel off the control script and freely select to copy; 4. Trigger text re-rendering through the translation function to invalidate the anti-copy script to complete the copy.

If Google Chrome freezes, freezes, or crashes, you can try adjusting the hardware acceleration settings. First turn it on or off through the "Use Hardware Acceleration Mode" switch in the browser settings, and restart the browser; if the problem persists, go to the chrome://flags page, search for gpu-related options, disable experimental features such as Hardware-accelerated videodecode, GPUrasterization, and Zero-copyrasterizer, and then restart the browser to apply the changes.

Turn on incognito browsing in UC Browser to protect privacy. Select "Incognito Browsing" through the tab icon on the main interface or slide the sidebar to enter "Incognito Mode". You can also create a desktop shortcut in the settings. After startup, a prompt will be displayed at the top of the page and the operation will leave no local traces.

You can cast mobile videos to your computer through QQ browser cross-screen traversal, Miracast mirroring or third-party software. First, make sure the device is connected to the same WiFi, use the same QQ account to log in to the QQ browser on both the phone and the computer, click the "Cross-Screen Travel" button on the video playback page and select the target computer to complete the screencasting; if the computer supports Miracast, you can click "Screen Mirroring" in the phone control center to select the computer name to connect; you can also scan the QR code through third-party software such as ApowerMirror to achieve high-definition transmission.

OpenChrome’sMenubyclickingthethreeverticaldots(?)inthetop-rightcorner.2.Navigateto"Help">"AboutGoogleChrome"fromthedropdownmenu.3.Viewtheversionnumberdisplayedinthe"AboutGoogleChrome"tab,suchasVersion125.0.6422.78(Off

The links of informal platforms such as Haitang Literature City are constantly changing and may pose security risks, so their use is not recommended. You should search for the author's book title through formal platforms such as Qidian Reading, WeChat Reading, or official apps to ensure information security and genuine support.

Changing the default search engine first can solve the search problem in the address bar of Google Chrome. Especially in China, the instability of Google services can easily lead to search failures. Go to Settings → Search Engine → Select a commonly used Chinese engine such as Baidu or Sogou → Test the search function. If it is still abnormal, check whether the proxy settings are reasonable and eliminate network restrictions or firewall interference. Then clear the cache and cookies, disable ad blocking plug-ins in the extension, and check one by one whether it is caused by plug-in conflicts. The search function can usually be restored by changing the engine and eliminating network and plug-in interference.