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Technical Articles

System Tutorial

Why Third-Party Antivirus Isn't Needed on Windows 11

Windows Defender makes a difference to everything Despite some early problems, I have never installed any third-party antivirus software on Windows over the past decade and I don't recommend it to most people. Actually, this is completely unnecessary. Microsoft realized that it was necessary to have stronger security protection in an “out of the box” state, so it eventually developed Windows Defender and integrated it into Windows 8. Both Windows 10 and Windows 11 released since then have this feature built-in by default, although the name changes. After several tweaks, Microsoft finally officially renamed it to Mic

Aug 30, 2025 am 06:39 AM

How to change the screen resolution in Linux

Usexrandrtocheckcurrentandavailableresolutions.2.Generateamodelinewithcvtforcustomresolutions.3.Addthenewmodewithxrandr--newmodeand--addmode.4.Applytheresolutionusingxrandr--output.5.Makechangespermanentviastartupscriptsordesktopsettings.

Aug 30, 2025 am 06:15 AM

linux Screen Resolution

What to do if Win11 'Send to' menu is empty? The solution for an empty 'Send to' context menu

Ifthe"Sendto"menuinWindows11isempty,trythesesteps:1.OpentheSendTofolderviashell:sendto.2.ManuallyaddshortcutsforDesktop,Mail,orcompressedfolders.3.Checkfolderpermissions.4.RecreatethefolderusingCommandPrompt.5.Runsfc/scannowtofixsystemfilei

Aug 30, 2025 am 06:05 AM

What to do if Win11 has a Blue Screen of Death (BSOD)? The solution for Win11 BSOD errors

IfyourWindows11systemshowsaBlueScreenofDeath(BSOD),followthesesteps:1.Notetheerrorcode.2.BootintoSafeMode.3.Updateorrollbackdrivers.4.RunWindowsMemoryDiagnostic.5.UseSFCandDISMtofixsystemfiles.6.Checkdiskforerrorswithchkdsk.7.Uninstallrecentupdatesor

Aug 30, 2025 am 06:04 AM

How to Fix Windows 'The user profile service failed the sign-in'

Ifyouencounter"Theuserprofileservicefailedthesign-in"onWindows,trythesesteps:1.BootintoSafeModewithCommandPromptandrunSystemRestore.2.RenamethecorrupteduserprofilefolderviaCommandPrompt.3.Enablethebuilt-inAdministratoraccounttofixtheuserpro

Aug 30, 2025 am 05:07 AM

How to check open ports in Linux

Usess-tulntoquicklylistalllisteningTCPandUDPports.2.Alternatively,usenetstat-tulnforsimilaroutput.3.Uselsof-i:porttocheckspecificportswithprocessdetails.4.Testremoteaccessibilitywithtelnetornc-zv.

Aug 30, 2025 am 03:53 AM

linux 開放端口

How to change the default program for a file type

OnWindows,openSettings>Apps>Defaultapps>Choosedefaultappsbyfiletype,thenselectanewprogramforthedesiredextensionoruse"Openwith"whenright-clickingafile.2.OnmacOS,right-clickthefile,select"GetInfo,"chooseanewappunder"Op

Aug 30, 2025 am 02:49 AM

What to do if your Mac keyboard is not working

IfyourMackeyboardisn'tresponding,trythesesteps:restartyourMac,checkconnections,resetSMC/NVRAM,testinSafeMode,disableAccessibilityfeatures,updatemacOS,orusetheon-screenkeyboardfortemporaryinput.

Aug 30, 2025 am 02:18 AM

troubleshooting Mac鍵盤

How to enable Remote Desktop in Win11

ToenableRemoteDesktoponWindows11,useSettings,ControlPanel,PowerShell,orGroupPolicy.Ensurenetworksecurityandfirewallsettingsallowremoteconnectionsforsafeaccess.

Aug 30, 2025 am 01:22 AM

win11 remote desktop

How to reset a Mac to factory settings?

BackupyourdatausingTimeMachineoranothermethodtopreventpermanentloss.2.SignoutofAppleID,iCloud,Messages,andFaceTimeviaSystemSettingstodisableActivationLock.3.RestartandholdCommand(?) RtoenterRecoveryMode,thenuseDiskUtilitytoerasethestartupdiskwithMacO

Aug 30, 2025 am 01:08 AM

What to do if Win11 user profile is corrupted? The solution to fix a corrupted user profile

IfyourWindows11userprofileiscorrupted,trythesesteps:1.Createanewlocaluseraccount.2.FixregistryentriesunderProfileList.3.UseSystemRestore.4.Manuallycopydatafromtheoldprofilewithadminrights.

Aug 30, 2025 am 12:53 AM

Fix: 'We can't sign into your account' error

Ifyoucan'tsignintoyouraccount,trythesesteps:1.Checkinternetconnection.2.Clearbrowsercacheandcookies.3.Useadifferentbrowserordevice.4.Disablebrowserextensions.5.Resetyourpassword.6.Ensurecorrectsystemdateandtimesettings.

Aug 30, 2025 am 12:44 AM

How to connect to WiFi from the terminal in Linux

Using nmcli is the recommended method for connecting to WiFi. It is suitable for desktop systems and can automatically handle network configuration. If there is no NetworkManager, use wpa_supplicant to cooperate with dhclient to manually connect, which is suitable for minimizing system or advanced users.

Aug 30, 2025 am 12:37 AM

How to open Activity Monitor on a Mac

TomonitorsystemperformanceonyourMac,useActivityMonitortocheckCPU,memory,energy,disk,andnetworkusage.OpenitviaSpotlight(Cmd Space,type"ActivityMonitor"),Finder(Applications>Utilities),Siri,Dock(dragiconforquickaccess),orTerminal(useopen/A

Aug 30, 2025 am 12:24 AM

mac