Count files in a folder from Command Prompt / PowerShell

• Command prompt 
• dir *.* /a-d | find "File(s)"
• dir *.* /b /a-d | find /c /v ""
• PowerShell
• (Get-ChildItem C:\csv -filter "*.*").Count
• (Get-ChildItem C:\csv -recurse -filter "*.*").Count recursive search
• (Get-ChildItem C:\csv -filter "*.*").Count
• [System.IO.Directory]::GetFiles("c:\Path").Count

Store location of the opened tabs from Chrome browser / Restore opened tabs from Chrome

Go the the following location:
%userprofile%\AppData\Local\Google\Chrome\User Data\Default\Sessions

To restore your opened tabs to another PC or user copy the files in this locatation to your new device:
Session_*.* and Tabs_*.*

How to search for special characters in files or folders from Windows Explorer

If you want to find a special character in a filename or folder go to the searchbox and type:

~="@"

This will find any file or folder containing the @ character

Change wireless network priority from command line

Open a command prompt and enter:

netsh wlan set profileorder name="NetworkName" interface="Wi-Fi" priority=1

Delete network profile / wifi connection from command prompt

Open a command prompt and run the following command:

netsh wlan delete profile name=SSID

If you get the following error:

You do not have sufficient privileges or the profile "YourProfile" on interface "wifi" is a group policy profile.
then try this:

• stop the WlanSvc service (WLAN AutoConfig)
• delete all files in the \Windows\wlansvc\Policies folder
• try again to delete the profile
• netsh wlan delete profile name=SSID
• restart the WlanSvc service

Add a network printer & Set a default printer in VBScript

Set WshNetwork = WScript.CreateObject("WScript.Network")
WSHNetwork.AddWindowsPrinterConnection "\\ServerName\PrinterName"
WSHNetwork.SetDefaultPrinter "\\ServerName\PrinterName"

Disable ask for password after sleep

Windows 10:

Go to Settings > Accounts > Sign-in Options > Require sign-in and select Never

Windows Error Reporting folder location

The Windows Error Reporting folder location can be found here:

%LOCALAPPDATA%\Microsoft\Windows\WER

All files inside this folder can be deleted

fix GRUB missing in Windows/Linux dual-boot

Open a command prompt with elevated rights (run as admin) and run:

bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi

To restore to previous settings run:

bcdedit /deletevalue {bootmgr} path \EFI\ubuntu\grubx64.efi delete grub boot

bcdedit /set {bootmgr} path \EFI\Microsoft\Boot\bootmgfw.efi set windows boot

List installed printers from command line / PowerShell

Open a command prompt and run:

wmic printer list brief

Open PowerShell and run:

Get-Printer | Format-List list printers with details

Get-Printer | Format-List Name list printers names

Excel print to pdf gets the error mandatory field empty

This error occurs when you click on Enable content.

To solve this, you have to go to

Options > Trust Center > Trust Center Settings > Trusted Documents

and click on the Clear button

Fix: Skype for business error: There was a problem acquiring a personal certificate to sign in

How to fix Skype for business error: "There was a problem acquiring a personal certificate to sign in"

Step 1: Delete sign in information

• open skype
• click Delete my sign-in information
• re-login

Step 2: Delete certificate

• open a command prompt and run the following command:
• certmgr.msc
• Go to Personal/Certificates
• delete the certificate issued by Communications Server

Step 3: Flush the DNS cache

• open a command prompt and run the following command
• ipconfig /flushdns

Step 4: Delete sip folder

• delete your sip folder:
• Windows XP
• go to %USERPROFILE%\Local Settings\Application Data\Microsoft\Communicator<sip_YourEmailAddress>\
• Windows Vista/7/8/10
• go to %LOCALAPPDATA%\Microsoft\Communicator<sip_YourEmailAddress>\
• if you can't find the folder just search in %appdata% for SIP_ and delete that folder (it should look like this: sip_YourEmailAddress)

CrowdStrike Windows Sensor: install location

C:\Windows\System32\drivers\CrowdStrike

CrowdStrike Windows Sensor: Check if service is running from command line

Run the following command:

sc query csagent

Map network drive from command line

Open command line and enter:

net use y: \\ServerName\SharedFolder /persistent:yes

Use the /persistent switch to restore the connection at next logon

Show / delete Wi-Fi profiles from command prompt

To show the network profiles type:

netsh wlan show profiles

To delete a specified network profile type:

netsh wlan delete profile name="profile name"

To delete al network profiles type:

netsh wlan delete profile name=*

Notepad header & footer settings

Go to File > Page Setup and enter the commands as you need:

&l       Left-align the characters that follow

&c      Center the characters that follow

&r       Right-align the characters that follow

&d      Print the current date

&t       Print the current time

&f       Print the name of the document

&p      Print the page number

remove IMG_ from files / rename file from command prompt or PowerShell

Open command prompt and enter:

ren "img_*.jpg" "////*.jpg"

Open PowerShell and run:

get-childitem *.jpg | foreach { rename-item $_ $_.Name.Replace("IMG_", "") }

Fix Error "The Group Policy Client service failed the logon. Access denied"

When a specified user tried to login he gets the following error:
The Group Policy Client service failed the logon. Access denied

Fix:

• Control Panel -> System -> Advanced system Settings
• System Properies -> Advanced -> User Profiles -> Settings
• Delete the specified user profile (and restart the workstation)

FIX Adobe Reader: A 3D data parsing error has occurred

• Go to C:\Users\UserName\AppData\Local\Adobe\Acrobat\
• Here you will find a folder named 2015 or DC which you can rename or delete
• (eg: 2014.bak or DC.bak)
• re-open the document