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System Security
Desktop Support
How To
Network Design & Installation
-- Help plan scalable TCP/IP network for high availability.
-- LAN/WAN, Wireless network device setup. Implement firewall and VLAN.
-- Integrate corporate business' IT policy and network IT systems.
-- Recommend and setup wireless network.

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Computing Tips:


1,024 Byte = 1 Kilobyte (KB)

1,024 Kilobyte (KB) = 1 Megabyte (MB)

1,073,741,824 Bytes = 1 Gigabyte (GB)

1 Gigabyte (GB) = 1,024 Megabyte (MB)

1024 Gigabyte (GB) = 1 Terabyte (TB)

How to Delete Synched Photos from iPhone 4S' "Photo" Library When my iPhone 4S' OS got updated to OS8 by force, I noticed there is extra folder "Photos" in the Camera Roll. Somehow, in the iTunes, synching "All Folders" caused all the saved photos on my PC to be copied over to the iPhone. When I found the menu to stop the auto synch, it was too late. All 900 some photos got copied over to my iPhone. Tried a couple of solutions to delete pictures in the "Photos" folder, but there is no "Delete" feature available in the iPhone's Edit menu. I found a couple of solutions on Apple's website, but they did not work. Thankfully the CopyTrans application did the job. After making sure that all my important photos are indeed backed up/copied to my PC or iCloud, I launched "CopyTrans" application. You can follow this and try it: After CopyTrans is launched, select CopyTrans PHOTO. When your iPhone is recognized, it will show you the groups of photos that are on your iPhone's Camera Rolls. Select the Albums on the left column and select DELETE option from Right mouse click drop down menu; And select "APPLY CHANGES" button on the top menu. It will refresh the screen and the Album disappears. Check the iPhone's Camera Roll. Album is deleted also. Notice, when "Photo Library" folder is the only ones left on the left column menu of CopyTrans, the right mouse click "Delete" is no longer available. What to do? Click on "Photo Library" folder in the Left column. All it's contents/pictures are displayed in the center column. Move your mouse to the Center column where all the pictures are displayed. Select some at a time or screenful at a time, Right mouse click on the selected groups of pictures from the center column and select DELETE. Then press "APPLY CHANGES" button on the top menu. All pictures in the center column in the "Photo Library" disappears. Check your iPhone's Camera Roll. Click on "Photos" folder. All the synched pictures have been removed.

Home Wireless Network is as Easy as Ethernet. "Almost" all Internet Service Provider offers LAN and Wireless services to residential area. Some also provide these services without the need for LAN line phone services. Many users have been ditching the LAN line and even patch through to Internet via their Smart cell phone service provider. Regardless of which service you choose, do some homework first before jumping into one. Technologically, depending on where you live and services available in the are, you have a couple of choices available to your advantage. Otherwise, you maybe one of the few who are stuck with such and such service carrier that we have to bear with until a new and better competition rattles their cage. Let's surf with a style and speed. Now you want to hook up all your family member's computers for Internet access, but don't want to exactly deal with running wild numbers of 50 feet cat-5 cables all around the house, then the wireless network is a good solution. Experience the blazing-fast wireless speed connection up to 108Mbps with 802.11g wireless router. Make sure when the tech support connects your in-house modem box that they connect it to the type of service plan you purchased. Meaning, they have connected to you to the correct SERVER that is providing you at the service speed you purchased. Make sure you configure your wireless router's connection security with WPA, WPA2 etc. WEP & WPA security, etc. gives wireless networking range of 400+ feet. It gives you the freedom to connect to Internet from the 2nd floor bedroom, your backyard, around the house freely. And with easy web access router management menu, you can setup your wireless network security to prevent evesdroppers and hitchhikers at your expense.

To find out more information on Wireless security, check out the following web site at CISCO. It maybe a bit too much for home user, but you can compare the industry wireless security requirement vs home.http://www.cisco.com/web/strategy/healthcare/secure_wireless.html For home wireless security, as a starter:http://www.pcmag.com/article2/0,2817,2420002,00.asp Then and again, if your router is provided/purchased/leased from the Internet carrier provider, then, make sure before the tech support leaves your home, to log onto the router and go through all the configurations to understand what you need to know and change and control to setup wireless security for your environment.


What is wireless network or How WiFi works? How secure is it? Check this site under "Computer Stuff" - Click on the Icon:


or click on http://www.howstuffworks.com/search.php?pg=&server=www.howstuffworks.com&ref=TopSearches&terms=Wi-Fi

COMPUTING TIPS for PC Running Windows and Linux:

Linux-Fedora 20 Tips

Wireless network router connection to your DSL modem tip

The following information maybe outdated, but still a good start to understand the basic. Today, you have the option to connect DSL line without the LAN line (phone line) or use the provider's phone service, providing that you live in an area where DSL without LAN line is available. One of the important steps not to miss is to READ the manufacturer's instruction on the Bootup Sequence of Wireless router and DSL modem after completing the required cable hook ups. Whether you are building business' wireless network or for home, the correct bootup sequence is important in assuring hardware recognitions by your computer operating system. A couple of newer and better wireless routers are: Linksys Wireless-N Router with 4 Port Ethernet Switch; Linksys N750 Wi-Fi Wireless Dual-Band+ Router with Gigabit & USB Ports, Smart Wi-Fi App Enabled to Control Your Network from Anywhere (EA3500-FFP), etc. Be sure to check the Data Transfer Rate, etc. While different brand wireless routers could have different bootup sequence requirements, here is the old Netgear WGT624 Wireless Router and Yahoo DSL Modem's for Windows. It may apply to all other router's connection setup requirements. This is the same instruction that is printed on the WGT624's Setup Guide. After double checking to make sure that your wireless router's driver software has been successfully installed and all cables to DSL modem and wireless router are hooked up correctly -

1. Turn Off and Unplug the modem, Turn Off the router and Shutdown the computer.

2. Plug in and Turn On the modem. Wait about 2 minutes <---very important to wait two minutes.

3. Turn ON the router. Wait about 1 minute <---be patient and give it a minute. Check the router's status lights -- all go?

4. Turn ON the computer.

If you have any question, please send me an e-mail to Contact helpdesk@pcdavinci.com.

Questions on USB Peripheral Connections?

Check out some basic information on USB and its spec.http://www.techadvice.com/tech/U/USB.htm

Or, go straight to its source - http://www.usb.org/about/faq/

I hope everyone's computer monitor has been upgraded to a flat panel, energy saving EPA approved, USB connector type, but just in case you are die-hard conservationist - still using the VGA monitor like me - A tip to Correctly Bootup Peripherals with VGA Cable -- For Example, Portable Overhead Projector.

Still got the old monitor? or device with VGA cable? While many computer peripherals' connectors have changed to USB type which gives user much convenience of Plug'n Play feel (but not always), some of the peripheral equipments still come with VGA cable - portable overhead projector for example. If you run into a problem where you cannot bring up the projector on the screen, 99% of the time, your computer was up and running when you connected the projector. The proper and painless way to assure that your computer images will be displayed on screen through your projector, do the followings to assure your meeting attendees that you are cooool.

1. With computer powered off, connect the VGA cable of the equipment with its power off to the computer's "display" port.

2. Power On the Peripheral - in this example, power up the portable projector.

3. Power On the computer. If it's a laptop, switch its display to laptop&secondary screen or to screen using keyboard's function key.

Your computer's image should be projected to screen after it recognized the connected peripheral during the bootup.

If your conference rooms are installed with Smart TV/Screen, make sure the HDMI cable is securely connected to the desktop unit or laptop. Make sure the "Screen Resolution" option is selected from the desktop (right mouse click on the desktop) and select 'Duplicate' as an option to display whatever is on your PC to be projected also to the Smart TV/Screen.

Is your Computer System Secured?

1. Right mouse click "My Computer", select "Properties".

2. Make sure that System information under "General" tab indicates OS Service Pack is current. Always in Manual control of your PC System OS's Updates. Unless you have an auto scheduled backup of your computer turned on and you have nothing to loose, if your system dumps.

Take advantages of free Computer tips and Webcasts from Microsoft TechNet.

If you are interested in signing up for free technical Webcasting seminars in various Windows system administration, be sure to visit Microsoft's TechNet site. There are abundance of new online knowledge base supports, briefing, & classes being offered on topics such as Securing MS Exchange Servers, Active Directory Administrations, Servers, MS SQL Server, etc.

If you have any computing question, please send an e-mail to Contact helpdesk@pcdavinci.com.

Your question and answer will be posted.


Q: Which Antivirus software program is better? Norton or McAfee Trendmicro or Kaspersky Internet Security?

Ans: It's better to have one or the other than none. For home PC, buy one that meets your budget. Both Norton, Kaspersky, and McAfee have good reputation. Some cable service companies provide free limited time Internet security applications with the Internet service purchase. I kind of find these offerings annoying. Once they expire, the warning pops up never endingly. When you purchase it separately and install it, it still complains that it is expired, etc. Because of various hardware configurations and OS levels, be aware of the System requirements when you select one to purchase. And learn how to control it. Do not let it Control your PC. PCdaVinci is impartial to antivirus products by its brandname. Just get one. Understand it's program settings/features - such as Real-Time Scanning capability. Scheduled Scanning capability. Automatic Scan Engine Updates. Tech Support Service - Can you get hold of them when your PC is in trouble?

Wondering the Basics of "How" Things Work? Try this site:


How To:

1. How can I quickly provide information about my PC running Windows XP, Vista, Windows 7, Windows 8, or in MAC during a Tech Support Call?

In Windows XP, under "All Programs" or "Programs" (in Classic View) Menu, Click on "Remote Assistance".
It opens up "Help and Support Center" window.
Down at the bottom, left column under "See Also", click on "My Computer Information".
Information about your computer will be listed nicely. With all other OS, do the same and get to know what's under the hood - check for System's folder as a start.

2. Where To Look for Windows' Error Log(s):

Ans: In Windows, Right Mouse Click on "My Computer".

Select "Manage".

Expand "Computer Management (Local)"

Expand "System Tools"

Expand "Event Viewer".

Click on "Application" or "Security" or "System" to locate "Warnings", "Error" or any other pertinent information generated by your computer sources listed.


3. This maybe totally outdated, but just in case you still got the old version running, which you shouldn't be - My QuickTime is not working in Mozilla Firefox. Any solution?

Solution #1: Try installing the QuickTime "Plug-ins" at https://addons.mozilla.org/firefox/plugins/.

Solution #2: Check \Start\Settings\Control Panel\Quick Time\Browser tab, and select "MIME SETTINGS..." button. Select the MIME types (Multipurpose Internet Mail Extensions, has to do with the configuration of past and current Internet e-mail protocol) that you want the QuickTime Plug-in to Handle or Deselect to prevent QuickTime from interfering other respective plug-ins from handling the program.

If you continue to experience trouble, please send an e-mail to Contact helpdesk@pcdavinci.com.

I will find the solution for you.

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