Sincere Sales Approach: The buying process is always about our customer, we listen sincerely without an agenda.

Innovative Strategies - A man convinced against his will is of the same opinion still, make the sales is all about building a trustworthy win-win relationship.

Unique Customer Experience - At KEVRON It’s always about leaving people with a good feeling about our business.

Disable Admin Block in Windows 10/11 for Installing App

To remove the admin block using Registry Editor:

  1. Press Win + R to open Run.
  2. Type regedit and click OK to open Registry Editor. Click Yes, if prompted by User Account Control.
  3. In Registry Editor, navigate to the following location:


  1. Select the System subkey under Policies.
  2. In the right pane, locate EnableLUA.
  3. Right-click on the EnableLUA value and select Modify.
  4. Type 0 in the Value data field and click OK to save the changes.

Windows 11 Disable Super Fetch and Cortana to fix High CPU Load Issue


Superfetch (Sysmain) is a service that allows apps on Windows to load content even before you open them. However, depending on the number of apps you use and your PC’s configuration, the CPU usage can also bump significantly. To fix this, you can disable the Superfetch service for some time. Here’s how.

Step 1: Press the Windows key + R to launch the Run command. Type in services.msc in the box and press Enter.

Step 2: Locate the SysMain service on the list and double-click on it to open its properties.

Step 3: Change the Startup type to Disabled and hit Apply followed by OK.

Restart your computer to apply the changes and monitor if it still shows high CPU usage in the Task Manager.


Many users have also reduced CPU usage after disabling Cortana on Windows. Although Microsoft’s digital assistant is much less intrusive on Windows 11, it might hog system resources at times.

Step 1: Press the Windows key + I to open the Settings app. In the Apps tab, click on Installed apps.

Step 2: Scroll down to locate Cortana, click on the three-dot menu next to it, and select Advanced options.

Step 3: Lastly, toggle off the Cortana option under the  ‘Runs at log-in’ section.

Set Up a ZeroTier Network on OpenWRT

Mirrored from:

In this test, we set up Zerotier on Asus OpenWRT routers. To use ZeroTier service, you need to create your own ZeroTier account. Sign up for an account here:

Important: Stop other VPN service on the router before you start is recommended

Login your ZeroTier account. Go to Network menu and click on Create button
to create a new network.

Next you should see the configuration page of your network. Please jot down the Network ID which will be used later.

Setup ZeroTier on router


SSH to the router, and execute the following commands to install ZeroTier package:

opkg update
opkg install zerotier
opkg install ipset



You should edit the configuration file /etc/config/zerotier to enable ZeroTier
and join into a network. It looks like:

# cat /etc/config/zerotier
config zerotier 'sample_config'
	option enabled '1'
	list join 'd5e5fb6745219a7d'

Please replace the code above d5e5fb674521a7d with your own Network ID.


If you want to access the router’s LAN, you have to configure the firewall as
well. Please edit the firewall configuration file /etc/config/firewall. Add
below lines into it.

config zone 'vpn_zone'
	option name 'zerotier'
	option input 'ACCEPT'
	option forward 'REJECT'
	option output 'ACCEPT'
	option device 'zt+'
	option masq '1'
	option mtu_fix '1'

config forwarding
	option dest 'zerotier'
	option src 'lan'

config forwarding
	option dest 'lan'
	option src 'zerotier'

Start ZeroTier Service

/etc/init.d/zerotier restart
/etc/init.d/firewall restart

Go back to your Zerotier’s web console and you will see the device which you just joined. Check the checkbox of “Auth?”, otherwise, your device may not be able to get an IP address from ZeroTier.

After authentication, the network interface will obtain an IP address. Check it
out via ifconfig, it looks like:

# ifconfig 
ztwdjh372k Link encap:Ethernet HWaddr 7E:BD:F0:B6:4E:87
inet addr: Bcast: Mask:
inet6 addr: fdd5:e5fb:6537:869a:7d99:9327:7681:2b7c/88 Scope:Global
inet6 addr: fce2:6361:1827:7681:2b7c::1/40 Scope:Global
inet6 addr: fe80::7cbd:f0ff:feb6:4e87/64 Scope:Link
RX packets:39 errors:0 dropped:0 overruns:0 frame:0
TX packets:68 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1638 (1.5 KiB) TX bytes:4368 (4.2 KiB)

Managed Routes(optional)

You can manage route in ZeroTier’s web console. For example, I add a static route on Managed Routes, so that I can access the router’s LAN.

OpenWRT – Change LAN IP in LuCI (to an IP on a different subnet)

Issue: Can’t change LAN IP in LuCI. After applying the changes, it fails and comes up with some dialogue box.

Root cause: This happens if the new IP is on a different subnet. It’is known and in fact deliberately designed to prevent the user from accidentally locking themselves out.

Solution: If you are confident that the new IP is correct, you have a few options:

  • Choose Apply Unchecked in the dialogue box*/. This will apply the settings without checking if you can access the new IP or not, so double check the IP.
  • If you prefer to not to bypass the check then you can do one of the following immediately (within 30 seconds) after changing the IP and applying the settings:
    1. Make your PC get a new IP (for example by disconnecting and reconnecting the cable or the WiFi, or via the terminal), then quickly edit the router IP in the browser Window to the new IP.
    2. Have prepared two static IPs for your PC LAN interface (one on the old IP range and the other in the new IP range), then after applying the settings in LuCI you quickly edit the router IP in the browser Window to the new IP.
  • Connect with SSH and issue the commands: 
    uci set network.lan.ipaddr='' ; uci commit network ; service network restart

Fix Network Printer Error 0x0000011b on Windows 11/10

CVE-2021-1678 mitigation is one of the reasons why you could be seeing Error Code 0x0000011B, this is not a permanent solution but while you are waiting for Windows to release a fix for this problem, you can try this.

Open Registry Editor from the Start Menu. Go to the following location.


Right-click on Print and select New > DWORD(32-bit) value. Name the newly created value “RpcAuthnLevelPrivacyEnabled”, and set the Value data to 0, and click Ok.

run services.msc and restart print spooler

Ensure that the registry is installed in both windows 11 and 10 machine that you are doing sharing together

TM Unifi, Maxis and Digi Fibre VLAN Setting at Router

Unifi Fibre

Maxis Fibre using Unifi Infra

Digi Fibre using Unifi Infra

PPPOE Username : *
Internet Vlan/VID : 629 (Under LAN menu > IPTV)
MTU: 1492
Enable Multicast Routing : Yes (Under LAN menu > IPTV)
IPV6 : Native
IPV6 Interface: PPP
DHCP-V6 : Enable
The rest: default value

Disable X1 Carbon Auto Power On

This had to do with Lenovo Power Smart, turn off from Registry edit:


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