Archive for category General Technology

Computer Power Supplies VS. Power Consumption

Many people don’t realize that just like your automobile, computers have unique power requirements. Several years ago I had to help a relative with her car – a 1975 Ford Mustang. She recently had a new stereo system, sub woofer, the whole kit n’ caboodle installed in her Mustang. She complained that her car constantly died and was a bit of an ordeal to start in the mornings. The battery seemed fine, the alternator checked out, but after her new stereo system was installed, she constantly had problems with her car dying. What the problem boiled down to was this: after she upgraded the stereo system in her car, the car’s power requirements went up two fold. The car’s old, factory stock battery could not keep up. With my help she changed out her old car battery for a new, bigger and better battery and the problem was resolved.

Computers are very similar. If you upgrade components in your computer, you also should consider what sort of strain this will place on your computer’s power supply.

Your standard, “bare bones” computer does not require much power. With only one 400 gigabyte hard drive, a dual core processor, 2 gigabytes of RAM, one optical drive… At a minimum you need a 300 watt power supply. With a mid level computer, that is a computer consisting of one, one terabyte hard drive, a Quad core processor, 2 gigabytes of RAM, a high end video card – you definitely need a 500 Watt (or greater) power supply. Anything above that and a 600 – 700 Watt power supply is a must.

For example:

custom dvr compilation1 Computer Power Supplies VS. Power ConsumptionCentral Processing Units
Under an extreme level of process tasking, from your computer’s CPU – for example Intel’s Q8400 – you should expect to see around 200 Watts of power consumption.

Hard drives
For hard drives, most manufacturers post their power supply requirement / information online. As a general rule of thumb, though, each hard drive uses about 10 Watts.

Video cards
For Most of the newer video cards – for example the GeForce 9500 GT – the manufacturer’s minimum power requirement is a 500 Watt power supply (or greater). The power consumption, of course, varies per application. Under a heavy processing load, though, you should expect to see about 212 Watts of power consumption.

CD / DVD drives
At the CD / DVD drive’s maximum burst output, you should expect to see about a 25 Watt power consumption.

RAM
Under a heavy load, you should expect to see a 1.5-2 Watt power consumption. This value is based upon Kingston KVR667D2N5 – 1 Gigabyte – DDR2 RAM.

Furthermore, all USB devices (unless powered through an AC/DC adapter) also draw power through the Universal Serial Bus. If you are trying to make a precise estimate of how much your minimum power requirements are, you might also want to take this into consideration.

If you add these values together :
(200 Watts (CPU) + 10 Watts (HDD) + 212 Watts (Video card) + 25 Watts (CD / DVD Drive) + 2 Watts (RAM)) = 450 Watts.

These values were calculated in reference to a basic “mid-level” computer system, as mentioned above.

Just remember: If you upgrade the components of your computer, but neglect to also upgrade your computer’s power supply – the more inevitable it is that you will have problems somewhere down the line.

If you have any questions or comments, be sure to let us know! Thanks for reading.

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Active X & Direct X Troubleshooting for Windows 2000 & XP

Many sites on the Internet use Active X or Direct X controls to display web content on your computer monitors. If you are having the following issues, the below instructions offer possible solutions.

Issues:

  • Active X or Direct X Will Not Load
  • WINXP IE Service Pack 2 Not Allowing Load

The following applies to Windows 2000 and Windows XP, and is meant to be used by experienced PC users ONLY.

  • Open Internet Explorer, click on Tools, click on Internet Options
  • Click on the Security Tab
  • Click to Highlight Internet, click Custom Level button
    • .NET framework-Run Authenticode not signed—click to ENABLE
    • Run components signed with Authenticode—- click to ENABLE
    • ActiveX controls and plug-ins
      • Automatic prompting for ActiveX controls—- click to ENABLE
      • Binary and scripting behaviors—- click to ENABLE
      • Download signed ActiveX controls—- click to ENABLED
      • Download unsigned ActiveX controls—- click to ENABLED
      • Init and script ActiveX controls not marked as safe—- click to ENABLED
      • Run ActiveX controls and plug-ins—- click to ENABLE
      • Script ActiveX controls marked safe for scripting—- click to ENABLED
  • Downloads
    • Auto prompt for downloads—- click to DISABLE
    • File downloads— click to ENABLE
    • Font download—- click to ENABLE
  • Java VM
    • Java permissions—— click to HIGH SAFETY
    • Access data sources across domains—- click to DISABLE
    • Allow META REFRESH—- click to ENABLE
    • Allow scripting of IE web-browser controls—- click to DISABLE
    • Allow scripting of windows without size or position—- click to DISABLE
    • Allow web pages to use restricted protocols for active— click to PROMPT
    • Display mixed content—– click to PROMPT
    • Don’t prompt for client certificate selection —— click to DISABLE
    • Drag and drop or paste files—– click to ENABLE
    • Installation of desktop items—-PROMPT
    • Launch programs and files in an IFRAME—- click to PROMPT
    • Navigate sub-frames across different domains— click to ENABLE
    • Open files based on content, not file extensions—- click to ENABLE
    • Software channel permissions—– click to MEDIUM SAFETY
    • Submit non-encrypted form date—- click to ENABLE
    • Use Pop-Up blocker—- click to ENABLE
    • User data persistence—– click to ENABLE
    • Web site in less privileged web content zone can navigate—- click to ENABLE
  • Scripting
    • Active scripting—– click to ENABLE
    • Allow paste operations via script—– click to ENABLE
    • Scripting of Java applets—- click to ENABLE
  • User Authentication
    • Logon
      • click to Automatic logon only in Intranet zone
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Detecting & Battling Key Loggers, Computer Monitoring & other Malicious Activities

Now that we’re all paranoid, or at least on guard, from Eric’s counter surveillance post, lets increase that paranoia some more by diving into computer counter surveillance.

Computer surveillance is when someone is watching everything you do on your computer. It is not the same as someone blocking certain Web sites or preventing spam in your e-mail inbox. Computers are an excellent source for people to spy on you because of the wealth of information they store.

In 1994, the U.S. government passed the Communications Assistance for Law Enforcement Act (pdf file), which allows for all phone calls and internet traffic to be made available for unimpeded real-time monitoring by Federal law enforcement agencies. These agencies use programs such as TEMPEST, “Magic Lantern” and CIPAV that can identify and report any trigger words or phrases, suspicious Web sites and communication through chat and e-mail with suspicious individuals or groups.

The government is not the only entity that has access to computer surveillance programs. Your neighbors, parents or even your significant other could be using computer software to spy on you.

The most common type of computer surveillance involves installing key logging software or hardware. When key loggers were first developed, they recorded each keystroke made on the computer. However, these programs have developed to include the ability to take screen shots, record chat-room conversations, pictures, and sent or received e-mails.

Some signs that your computer has a key logger or some other form of spyware installed include:

  • Slow PC start-up and Internet browsing
  • Increased processor usage
  • Hard drive constantly running
  • Changes in mouse or keyboard response time
  • Display errors

To see if there are any suspicious programs that you did not install look in the task bar, task manager and in “Add or Remove Programs” under the Control Panel. If there is anything that looks suspicious, research it and then delete it. In some cases, it may be necessary to restore your operating system from scratch to get rid of it.
You can help prevent computer surveillance by installing a program that detects monitoring software.

I would recommend reading through these additional resources on computer surveillance, key loggers and counter-surveillance measures:

I encourage you to share your experience with computer surveillance and any suggestions you may have in regards to warning signs and what to do.

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Computer or PC-Based Security DVR Running Slow? – Try these Tips First

Many times, whenever our computers break down, software is considered the culprit. Have you ever considered that your neglect of your computer’s hardware and internal file organization could also be the cause of the headaches, though? It’s true. Most of the time, our computers work perfectly. You zip through checking your email or slap together that spreadsheet your boss has been hounding you about, but you don’t give the computer a second thought.

There are times, though, when your computer is moving at a snail’s pace and you want to bang your keyboard on the desk or throw your monitor out the window… anything to make the thing work faster! Many of these issues with your computer slowing down can be eased or solved with simple “house cleaning” that should be performed every couple of months or so. Give the below tips a try and let us know if you have any luck! If these don’t help, your computer might be infected with spyware, malware or even a computer virus. See the bottom of this article for a few tips to try against these more serious issues.

Protecting your computer against dust

Dust is a major culprit in bogging down your computer. From a technician’s standpoint, I cannot recall how many times I have opened a customer’s computer and BAM! Dust bunny Central! Try to imagine a computer as you would your lungs. If your lungs are clogged, you cannot breathe. The same can be said for a PC. The inside of a computer is designed specifically to channel air through the case; to replace the hot air generated by all the components with cool air from outside. Try running a marathon with dust and cobwebs stuffed deep within your throat or lungs. You would rapidly expire from fatigue, head exhaustion, or a heart attack. Without fresh air to compensate for the heat generated by the computer’s components, the computer will slow down, more and more, as time goes on. Eventually, things will go very wrong and operation will grind to a halt.

I suggest doing the following, once a month.

After removing all cables from the computer, take a synthetic fiber brush and gently brush away the dust from the outside ports of the computer; the USB ports, back vent ports, power supply vents, etc. Anywhere that you see fleeing dust bunnies, brush these vermin elsewhere. Then, you need to remove the side panel from the PC by unscrewing any screws and sliding it off. Use a vacuum hose to GENTLY vacuum up all the dust inside of the computer. As a note of caution, jamming the vacuum hose into all the tight and hard to reach corners of the case might get more dust out, but you might also damage the internal components. Be careful when doing so. If you like, you can use compressed air to clean out the corners and internal components of the case a bit more. After vacuuming all the loose, rampant dust bunnies up, replace the computer’s cover and plug all your cables back in.

Disk Defragmenter

With the coming of age of Windows 95 came a new and extremely useful tool – the Disk Defragmenter. What this tool does is take all of the files and pieces of files, that Windows has haphazardly strewn all over your hard drive, and organizes them. Just as you would tell your son or daughter to clean their room, you’re telling Windows to clean its file system. This can free up space and bring back some of the old speedy days you saw before your computer became sluggish.

In Windows XP, you can access the Disk Defragmenter by clicking on:
Start->All Programs->Accessories->System Tools->Disk Defragmenter

Disk Cleanup

Windows 95 also brought us another useful tool – Disk Cleanup. This is a simple utility that scans your computer’s hard drive for redundant and duplicate files, useless files, items in your recycling bin, etc. Once these files are located, Disk Cleanup gives you the option to delete or remove said files. It can also compress old or unused files, saving even more space. Disk Cleanup is another tool you should use once every month or so that can help speed up your computer and get rid of useless garbage.

In Windows XP, you can access Disk Cleanup by clicking on:
Start->All Programs->Accessories->System Tools->Disk Cleanup

Free Resources for spyware, malware, and virus infections.

If you are experiencing weird popups, spam, or other malicious activities, I suggest trying the following three utilities along with the above procedures.

  • AVG – Free Anti-Virus Software
  • AVG is a free virus scanner & protection program that can help detect and prevent a lot of the malicious software out there. It does have a better, paid version, too… and I wouldn’t count on it as a be all and end all solution to your problems. It’s definitely worth grabbing and checking out, though.

  • Spybot Search and Destroy
  • This piece of software is very powerful and is used quite a bit to detect and eliminate spyware and other malicious software. There is an option to scan your registry before Windows load, which catches any software that may block other scanners, etc. Highly recommended.

  • Adaware

Free and paid versions are available, with the free version claiming “comprehensive malware protection.” This is another highly recommended piece of freeware that is used across the tech world to battle malware and malicious software.

These are only general suggestions and should be taken as such. We do not guarantee that these actions or programs will fix your computer, nor do we directly indorse any of the programs mentioned in this article. We have, however, found every suggestion here useful in the past, and want to pass them on to you as just that, suggestions. Best of luck, everyone!

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