System Tips

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3 System Title
Keywords		 Keyboard Steps Posted Date
Android Pdf Cache Problem
cache
To clear the PDF cache in Google Chrome on Android, you need to delete your general cached images and files or use device storage settings to wipe Chrome's app cache. [1, 2, 3]

Method 1: Delete Cached Files via Chrome Settings
  1. Open the Chrome app on your Android device.
  2. Tap the three-dot menu in the top right corner.
  3. Select History Clear browsing data.
  4. Set the Time range to All time (or the period when you viewed the PDF).
  5. Check the box for Cached images and files. (Make sure to uncheck other options like browsing history or passwords if you want to keep them.)
  6. Tap Clear data. [1]


Method 2: Force Clear Chrome App Cache

If the PDF is still stubbornly displaying an old version, wipe the app data directly from your device settings. 2]
  1. Go to your Android Settings.
  2. Tap Apps See all apps (or Manage Apps).
  3. Find and tap Chrome.
  4. Select Storage & Cache.
  5. Tap Clear cache
 06/13/2026
Windows Command Prompt Actions
cmd clipboard internet network repair troubleshoot performance ram ultimate slow		 in "Search" type "cmd" -> Run as administrator

assocFile opens wrong application.
assoc

ftypeShows what programs open what file types
ftype
  • shows application path}

    • DISMNeed a deeper scan tool
    DISM /Online /Cleanup-Image /Restore Health Deep repair tools
    AND
    DISM /Online /Cleanup-Image /startcomponentcleanup

    chkdskHard drive doing the weird check out you drive
    chkdsk /f> Checks for file system errors.
    chkdsk /f /r Checks for file system errors and repairs. You will reboot if you do the boot drive

    cipher Are deleted files are actually gone? Securely write over empty space on your drive.
    cipher /w:c:

    cleanmgrDisk Cleanup - Free up space on C: drive
    cleanmgr

    driverquery Show every driver and when it was installed. Drivers:
    driverquery Using the "/v" extension will download the ones you do not have
    then
    driverquery /SI confirms that all drivers are installed and ready

    getmac Get MAC address
    getmac Shows MAC address of local + remote machines

    gpresult See your group policies! Shows every Group Policy applied to user and computer
    gpresult /r

    gpupdate For admins: group policy update
    gpupdate /force Force Group Police update

    ipconfig Show my DNS cache
    ipconfig /displaydnsShows DNS cache

    netsh Is windows throttling your internet?
    netsh interface tcp set global autotuning=high

    See your wifi profiles. Shows all WiFi networks previous joined
    netsh wlan show profiles |clip

    Forgot your wifi password. Shows specific wifi network password in the clear
    netsh wlan show profiles name=yourwifi key=clear

    netstat Is your app on internet? Shows which apps are talking to the internet and which ports they?re using.
    netstat -abno |clip

    What application is using what port
    netstat -ano Shows ports + process IDs

    net use For admins: silently access network users C drive
    net use //computer/C$
  • Use reverse slash}

    • net user User profiles that are configured Shows all users
    net user

    Change password on user.
    net user existingUserName NewPassword The selected user will have his password updated.

    perfmonWindows reliability monitor - your computers problem history
  • graphical}
    perfmon /rel

    • powercfgCheck battery on laptop
    powercfg /batteryreport Creates battery health report

    Unlock Ultimate Power Plan. Search "power plan" to see what you are currently using
    powercfg -duplicatescheme e9a42b02-d5df-448d-aa00-03f14749eb61 Adds another performance item "Ultimate"


    sfcWindows depends on thousands of system files to function properly, and any of them can become corrupted due to bad updates, sudden shutdowns, or even malware. When that happens, you get vague symptoms such as apps crashing for no reason, Windows features stopping, or missing DLL errors.

    The System File Checker (SFC) scans every protected system file on your machine and compares it against a cached copy. If something doesn't match, it automatically replaces the corrupted file. To run it, open Command Prompt as administrator, type sfc /scannow, and press Enter. The scan usually takes 10 to 15 minutes and needs no input from you once it starts.
    sfc /scannow Repairs corrupt system files

    Once it finishes, SFC reports one of three outcomes. It either shows no integrity violations found, corrupt files found and repaired, or corrupt files found, but not all could be fixed. If you get the third result, run DISM /Online /Cleanup-Image /RestoreHealth first. This pulls fresh copies of files from Windows Update, then run sfc /scannow again. It should succeed this time

    shutdownComputer screwy Restarts PC directly into recovery menu.
    shutdown /r /o

    Force Windows shutdown
    shutdown /s /t 0 Force shutdown immediately (works remotely)

    Force Windows shutdown
  • IT gold}
    shutdown /i Graphical remote shutdown manager (IT Gold)

    • systeminfo Get system info
    systeminfo /fo list
    Shows just the OS information ? filtered, clean, perfect for screenshots.
  • later windows}
    systeminfo|findstr /B /C:?OS?

    • tasklist Got a resource hog. Shows how much resource an application is consuming.
    tasklist /fi ?imagename eq msedge.exe
  • Run ftype to get app names}

    Replace task mangager detective work
    tasklist /svc Shows what services and processes are running

    • taskkil/lKill frozen app and restart
    taskkill /f /im explorer.exe & start explorer.exe Restart Windows Explorer example

    whoami Who am I?
    whoami /groups Shows AD groups you?re in

    wmic Quick health check - Health check on hard drives or SSDs Reports OK if worky
    wmic diskdrive get status

    List of apps intalled on my system
    wmic product get name

    winget upgrade Update all applications. Updates all apps on your system, replacing chocolatey or manual updating
    winget upgrade ?all

    winsat mem It is time to test your ram chips
    winsat mem

    		 01/03/2026
    Windows Comand Prompt To Clipboard Using The "|clip"
    command clipboard powershell    		 clipboard is activated when the pipe symbol + clip is used. The output will not go to the screen

    Loading command prompt Output to clipboard using pipe. example: ipconfig /all |clip
    paste into document by ctrl V Notepad text dump    		 01/03/2026