Category Archives: Troubleshoot

404 Error and 504 Error: When a Webpage Won’t Load

You’re browsing online. Everything is going smoothly. And then it isn’t: you get an error message and suddenly you’re outta luck opening the webpage. A 404 or 504 error stops you dead in your tracks. The fact is, these web-based errors aren’t likely to be your fault. It’s usually a result of an error on the back-end, that is, on the server that’s hosting the webpage.  That being said, it’s still frustrating.

In the case when the problem does have something to do with your system setup, you wanna know how to fix it. And in any situation, you want to know where the root of the problem is.  Use this article to learn about the 404 and 504 errors: what they are and why they happen.  And then learn how to troubleshoot the problems, getting to the heart of the matter and finding out how to tackle the errors without going crazy.


A 404 error can appear in many different ways. Some cheeky websites even make 404 errors into a sort of joke. But sarcastic error messages aside, you’re still up against an error.


Basically, you get a 404 error if the page you are looking for isn’t on the website’s server any more. You can get the error in two ways. One, you may have simply typed in the URL wrong and send your browser to a bad location. Two, the website you’re trying to work with may have deleted or moved the page you’re looking for without redirecting the old location to the new one. Continue reading

Fix Windows Update KB3004394

There’s nothing glamorous about a designation like KB3004394, but that doesn’t mean you shouldn’t be concerned with it.  It’s a Windows Update that’s been released recently (Black Tuesday) and sad-to-say it’s been causing some problems … but only on certain computers. This update is affecting machines running these operating systems:

  • • Windows 7 Service Pack 1 (SP1) x86      (32-bit)
  • • Windows 7 Service Pack 1 (SP1) x64      (64-bit)
  • • Windows Server 2008 R2 SP1.

What’s the Problem?

Because Windows Updates often address several issues at once, this particular update could have various results.  The most common though is that – gulp – the update is negating your license so Windows is telling you that it isn’t activated; that you’re version isn’t genuine!

Other issues include:

  • • Various UAC (User Account Control) prompts that say weird things
  • • Windows Diagnostic Tool error 8000706f7
  • • An inability to install the AMD Catalyst driver
  • • Windows Defender error 2147023113

The Check

system_properties1If you’re not sure whether your system is one of the affected ones or not, find Computer in Windows Explorer and right-click it.  Then choose Properties.  The properties box will open showing you what version of Windows you have installed and whether or not you’re using a 32bit or 64 bit computer.

It’ll also tell you whether or not your version of Windows is properly registered.  If you haven’t received any alerts about your Windows Activation, or you haven’t experienced any other problems, you probably don’t have update KB3004394.  But it’s still a good idea the check here and make sure every thing is set right. Continue reading

Java Does Not Have Permission to Run: Get it Working

The message says your version of Java is out of date or that your Java security certificate is unrecognized or outdated.  What the heck does that mean, and more importantly, how do I fix it … like, now!

Because you’re trying to run that online game, or you’re trying to register for classes before the deadline, or you’re trying to initialized that mapping tool.  Java online platforms are still a prevalent medium on the web, enabling interactive tools and media.  Prevalent that is, unless it’s not working.

What’s an Applet Again?

Let’s say you’re trying to sign up for classes online. Simple, right? Every university seems to offer this sort of convenience these days. So you pull up the website and click on the link to start the special program the website uses to pull up your account.

That special program is a Java applet. When you click on the “My Account” button (or whatever your university has decided to call it), a new page pops open that allows you to login and then click and select all of the various things you need to click and select.  It’s a special program that is based on the webpage but runs on your computer.

And if it’s the night before a midnight deadline, it naturally locks up. You click on the account button and nothing happens. Then you get a message.


The application is blocked. If you’re lucky you get another message telling you why.

Continue reading

Troubleshoot: My Wireless Device Can’t Connect

It happens more often than it should; you’re surfing the web wirelessly and then you lose Internet connectivity.  You’ve checked and the other wireless devices on your network and they’re fine: it’s just the device you happen to be using.

The essential problem is that two parts of your wireless network are not communicating.  One is the router.  It broadcasts the signal even if you can’t see it.  The other is often equally invisible, but far nearer.  It’s a device (usually) inside your laptop, phone or tablet that receives the signal: the wireless network adapter.

an internal wireless network adapter

an external wireless network adapter

Troubleshooting like a Pro

First, the common-sense things: if it’s an external network adapter connected by a USB port, make sure it’s still plugged in correctly. Then try the classic reboot (making sure to exit out of all your stuff first.) Continue reading

Troubleshoot: “Not Connected” on a Wireless Network

Uh oh! You’re wireless Internet connection is out. Wi-fi is down. It may not be your worst nightmare, but on the day-to-day level, it’s pretty big pain, especially when it’s hard to know exactly where the problem lies. After all, the problem could be with one of four components: the modem, the router, the network adapter attached computer — or even the computer itself.

The good news is that nowadays setting up and maintaining a wireless network is easier than it’s ever been. That means that occasionally the problem will resolve itself if you wait a while or if you engage the old standby – restarting the computer. But if that doesn’t work it’s time to start troubleshooting. Use the steps below to figure out  (1.) where the problem is and (2.) the best steps for fixing it.

This is a straight-to-the point sort of guide. Sure there are complicated problems out there, and these can have really techy solutions, but the most likely scenario is that if you’re wi-fi was working before, then it won’t take too much to get it working again. Continue reading