How to change the name of a user profile folder in Windows 10

1. Try to create a new account

2. Change the new account to administrator

3. Restart computer and login with new account

4. Rename c:/Users/"Old_Account"

5. Modify registry. In the Run prompt (press Win+ R ), type regedit and hit Enter.

HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ CurrentVersion \ ProfileList \

6. Select ProfileList, click on the sub-key to find which ProfileImagePath is match your Old_Account, and then double-click ProfileImagePath string to open it. Rename Old_Account.

7. Modify registry to fix Users Folder error. In the Run prompt (press Win+ R ), type regedit and hit Enter.

Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders

Double click to open the value data, and enter either of these: 

%USERPROFILE%\Desktop

C:\Users\%USERNAME%\Desktop

PS: multiple items need to be modified.

Click OK, and quit the Registry Editor.

Refer to:

1. https://www.tenforums.com/tutorials/89060-change-name-user-profile-folder-windows-10-a.html

2. https://www.itechguides.com/change-user-name-windows-10-rename-user-folder-windows-10/

Create a local user or administrator account in Windows

 Create a local user account

1. Select Start / Settings / Accounts / Family & other users

2. Select Add someone else to this PC

3. Select I don't have this person's sign-in information, and then select Add a user without a Microsoft account

4. Enter username, password, or password hint3. 

Modify account type to Administrator

1. Select Start / Settings / Accounts / Family & other users

2. Select the account name that you want to change, Select Change account type

3. Select Administrator, and then select OK

4. Sign in with the new administrator account

Computer hardware information tools

1. CPU-Z

    https://www.cpuid.com/softwares/cpu-z.html

2. Speccy

    https://www.ccleaner.com/speccy

Command Line to get Win 7 / Win 10 / Win 11 system related information

1. Open cmd Terminal

2. Windows version 
    # winver

3.  local computer system information 

    # systeminfo

    # systeminfo | @find "開機時間"

4. Remote computer system information (limitation: Windows PC)

    # systeminfo / s {Remote IP}

5. Get MAC address

    # getmac

6. Get Remote PC MAC address (limitation: Windows PC)

    #getmac /s {Remote IP}

7. 查詢主機板廠商、主機板型號。

    #wmic baseboard get product,Manufacturer

8. 查詢主機板廠商、主機板型號、序號、版本號。

    # wmic baseboard get product,Manufacturer,version,serialnumber

9. 顯示作業系統Windows 10 序號

    # wmic path softwarelicensingservice get OA3xOriginalProductKey

10. 

    # ipconfig | find /i "IPv4"

11. use regedit to get Win10 product key

    「HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SoftwareProtectionPlatform」

   to find BackupProductKeyDefault, it contains ProductKey

特別注意：

「BackupProductKeyDefault」內所含的金鑰序號是「第一次」寫入的序號，有非常大的機率是不含正版啟用功能，目的只是為了可以識別或是正常安裝。

例如各大廠商如 HP、Acer 等，在電腦產品出貨前必須先寫入一組 BackupProductKeyDefault 來順利安裝系統與識別產品，這組序號僅供版本識別使用，沒有任何意義，隨後再把正式的序號寫入主機板中(OA3xOriginalProductKey)，所以我們才可以用 CMD 來查詢。

另外一種狀況是，當自己重灌電腦或升級時，輸入一組通用序號來讓流程順利進行，這組序號也會寫入 BackupProductKeyDefault 值中。

12.  Microsoft Store，search「ShowKeyPlus」and install it.

     It may update window if your system is too old to install ShowKeyPlus. 

13. Windows system file check, administrator cmd 

     # sfc / scannow

Refer to:

1. https://adersaytech.com/kb-article/how-to-check-windows-product-key.html

What will happen if your windows do not activate ?

having limited access to some basic feature:

1. customize your display

2. crucial security updates, bug fixes, or patches

3. can't lock screen

4. you’ll be limited to the default wallpapers that come with Windows.

5. You can’t remove the default theme

6. You’ll have default fonts only

7. Your Start Menu settings can’t be configured

8. You can’t customize your taskbar

9. Activate Windows watermark

10. You’ll get persistent notifications to activate Windows 10

VirtualBox Keyboard Not Working on Windows 10

VirtualBox Keyboard Not Working on Windows 10

1. Open Windows Setting Manager

2. Search "Add or Remove"

3. Removed touch pad driver "SynTP"

4. Restart Windows 10

5. Open Device Manager to check Keyboard and Mouse driver

6. Open a Text File or cmd terminal to check keyboard function 

Refer to :

1. https://www.technipages.com/fix-vmware-keyboard-not-working-on-windows#:~:text=Quick%20Fixes&text=Click%20on%20the%20virtual%20machine's,can%20use%20it%20within%20VMWare.

Ubuntu VirtualBox cannot create the machine folder ___MF___ in the parent folder ___PF___.

1. Please check ___MF___ is existed.

2. Check your privilege 

Copy large file cause system hangs up on ubuntu

1. Edit /etc/sysctl.conf

2. Added

    vm.dirty_background_ratio = 2

    vm.dirty_ratio = 4

    vm.dirty_bytes = 15000000

3. # sudo sysctl -p 

It seems OK on my Ubuntu 20.04.4, 62GB RAM, AMD Ryzen 7 3700 8-core

Debug a large file copy caused system hangs up (for ubuntu)

 use iotop to debug I/O issue

1. # sudo apt-get install iotop

2. # sudo iotop

3. start another terminal

4. # sync

5. to monitor the process to see if it's hanging.

    # top

6. start another terminal, print free memory every 2 seconds

    # free -ms 2

7. Start another terminal, 

# sudo nohup free -ms 2 &> ~/Documents/log/free.log &

# sudo nohup top -b -d 5 &> ~/Documents/log/top.log &

# sudo nohup iotop -b -d 2 -o -t &> ~/Documents/log/iotop.log &

# iostat -x 1           or              collectl -sD

# atop

Win 7 / 10 查詢變更授權

Refer: https://read01.com/zh-tw/Le32AL.html#.YjUy9H9BxEY   

           (2016/05/13 來源：紅黑聯盟)

1. 以管理員身份執行 cmd

2. "slmgr.vbs -upk"  ---- 卸載證書

    "slmgr.vbs -rearm"則為重置電腦的許可證書狀態

3. 重新導入相關的OEM證書及Key

    slmgr.vbs -upkpb61

4. ex. 以管理員身份運行cmd，導入密鑰的命令(這裡以聯想的Ultimate為例)：

slmgr.vbs -ipk 6K2KY-BFH24-PJW6W-9GK29-TMPWP

5. 導入證書的命令：

slmgr.vbs -ilc 證書路徑

其他命令及其作用：

slmgr.vbs -dli   (顯示許可證信息)

slmgr.vbs -xpr   (當前許可證狀態的截止日期)

slmgr.vbs -dlv   (顯示詳細的許可證信息)

slmgr.vbs -xpr

slmgr.vbs -ilc lenovo.oemcert.100036.xrm-ms

其它查看授權的方法：上網下載 slic toolkit 查看看 BIOS 有沒有windows 授權