Time
5 hours 33 minutes
Difficulty
Beginner
CEU/CPE
3

Video Description

Troubleshooting Operating Systems Part 3 What happens if there is an OS Missing error? What happens when a file in the GUI doesn't launch, what would contributes to registry errors and why would you get an error that says Invalid Boot Disk? After completing this lesson, you'll know how to troubleshoot and resolve each of these events and where you can develop some preventive maintenance practices to avoid some of as well.

Video Transcription

00:04
So let's say we're trying to start our computer and we have a message that our computer are operating. System is missing. We have a missing OS. Well, this may just be that our BIOS is Miss Configured. We may be trying to boot to a hard drive that doesn't have an operating system on it. So you want to make sure that we select
00:20
that our BIOS is configured properly? We might want to disable certain discs in our computer.
00:25
So are we. Don't try to boot to a comm device that doesn't have an operating system.
00:30
Same with our non bootable media. Maybe we have a disc in the CD slot and our BIOS is set on the boot order to boot to any potential disk first. If it if it sees that disk and it tries to boot to it, it may be a non bootable media. If we have
00:46
a video game in there or if we have undock be Photoshopped in there that were
00:51
just finished installing before we restarted our computer, then it may be our device may be trying to our computer. Maybe trying to boot to that media
00:59
are hard drive. May be improperly connected. We may have improper connections. As far as the cables go, it may be on the wrong connector on our scuzzy on our scuzzy ribbon cable. We may have the primary drive in the secondary dry on the secondary drive connector. We may have improperly set jumpers on our drive,
01:17
so even though it's in the right location on the cable, the jumpers aren't set to auto configuration,
01:22
where the primary drive isn't at the primary.
01:25
Um,
01:26
in addition to our hard drive being improperly connected are hard drive may have failed. Hopefully not. We want to make sure we really hope are hard. Drive doesn't hasn't failed because that means we're in store for some serious data recovery. Or it may be blank, but might even be even worse if our hard drive that the last time we booted was had
01:45
on operating system on it had files and had data on it. And now we stepped away and we rebooted, and now that hard drives blank.
01:53
That's Ah, that's a really scary situation, but it is it is a potential is a potential scenario or, if we say, bought a hard drive off of the Internet to install into our computer. Typically hard drives that we buy off of the Internet aren't going to come preinstalled with an operating system, especially since
02:13
that operating system when you install it
02:15
needs to be specific for your motherboard. Me be specific for your computer hardware, so you're going to get that hard drive blank and then you're going to install the operating system. So if we tried to boot to that hard drive right after we put it in our computer, then we might get a missing operating system message.
02:32
Now let's say our computer does successfully boot, but we're missing our graphical user interface. We're missing our gooey. We don't have our Start menu and our start bar. We don't have our icons. We don't have our desktop. What's going on?
02:45
It's missing or certain aspects fail to load
02:47
Well, our explorer dot e X C may have an issue. Our explorer, Dottie XY and Windows is our file that runs. It's our application that runs to give us that graphical user interface. The start menu, our desktop icons. Things that we can click on to get going and get moving will make there may have been a problem with that file. It may have failed to launch.
03:07
It may have
03:08
have some corruption, so we want to check into that. Maybe we want to do a restart of our computer. See, after that restart. If we can get going again and check and see why are graphical user interface failed? We may have some display issues.
03:23
We may have some improper drivers. Or maybe we just have a our computer. Expect there to be doing monitors. Or maybe we're plugged into a projector that's off
03:31
and our desktop isn't on. Ah, primary monitor. It's on that projector. It thinks it's supposed to be on that projector monitor so we don't see it. So you want to check our display settings. We wantto check for any potential display issues or any potential but driver problems that may be causing on missing graphical user interface.
03:50
And then, lastly, we may have some registry errors or registry corruption. Our registry is a series of It's a series of values assigned to different
04:00
different settings on our computer essentially, and our registry has different settings for our entire machine are particular particular user or
04:12
even their other different components. for a computer. It's used by applications. It's used by our operating system. Our registry is a very integrated part in our computer, and it can get corrupted and it can have invalid entries. It can have errors. So if we move to our computer and we log in tow one user and we noticed that
04:30
with this missing graphical user interface is
04:33
it's not loading. And we think it may be some registry issues. We may want to try to log out of that user. And if we have another user on the computer, try to log into that user and see their graphical user interface comes up. If it does, then we may be ableto limit the problem to that one user account,
04:50
maybe have some registry issues under that one users local user registry registry section.
04:58
So next let's say we try to start our computer and we get it. We see it's an invalid boot disk. Now this invalid boot disk may just be that we have in non bootable media. In our drive, we talked about non food. Will minute media several times are non bootable. Media is going to be a CD or a disk or a drive
05:15
that doesn't have an operating system on it. We're trying our computers, trying to boot to something
05:20
that doesn't have an operating system so we can't beat to it.
05:24
So we may want to check our BIOS settings. We may want to remove that device and to make sure that we actually boot to our hard drive that contains our operating system.
05:32
We may have a hard drive. Failure are hard drive may have crashed or hard drive may not be connected properly or or hard drive me. It just have been turned off in the BIOS for some reason. So we want to check all of those things. Make sure our hard drives interacting properly with our computer, for if we get that invalid boot, this message
05:51
and then last thing we want to check and there may be a boot sector virus on our hard drive boot sector, the virus would affect the way that our computer boots it would affect the way that we see that there's an invalid boot disk. We aren't able to boot toe are hard drive, so we may want to pull an anti virus program that we can run
06:11
from a disc that weaken boot, too,
06:13
and then use that disk to scan are hard drive, see if we can scan for any viruses, and we may want to go ahead and pull any data and back it up off of our hard drive and may possibly reformat are hard driving solar operating system.
06:28
And then, lastly, we have are missing in T l B R or boo dot i and II for X P computers. This NTL BR is a critical file for starting our computer contains necessary necessary settings necessary information for actually booting our computer
06:46
the same with boo dot i and I and X p.
06:48
If we get a message that we're missing in T l B r or boo dot I and I,
06:55
we want to check and see if it's possibly corrupt or missing. If so, we may be able to use a recovery disc in order to try to replace those files. Replaces critical operating system files that we need In order for a computer to start, we may have a corrupt sector on our drives are a hard drive, so we may want to form a cheque disc
07:13
check disc and potentially fix are corrupted sections in order to
07:16
fix that missing file. We may even be required after we do run a check disc and fix the sectors to then follow that up by running a recovery disc. But those corrupt sectors aren't going to just go away on their own if we try to run the recovery disc without running a check disc
07:33
and then that non bootable media again, our computer maybe trying to boot to that disk that we have in our hearts on our optical drive or maybe trying to boot to that USB that we have it all just depends on our boot order. It depends on how our cables are connected in our computer, and it depends on our bios settings
07:50
and then, lastly, are hard. Drive may be stuck,
07:54
um, sometimes are hard drive. It are hard drive, it may fail or are hard drive may fail to initialize, or it may fail to start spinning. Or it may just get stuck spinning, so we may need to remove that hard drive. A silly as it sounds, there's been plenty of instances where I've encountered where
08:13
you get this message you get this missing boot dot i and I.
08:18
And then you have you have a help desk person. You have a desktop support, say, why don't you just try tapping it
08:26
and say What you say? Well, just on your computer, there's a There's a place right, right to the right of your number, are right to the right of where your arrow keys are. There's a little bit of a blank space. Might be a Windows X P sticker right there. Just kind of tap it really firmly. And you say, OK,
08:45
user, that's using the computer. It completely does not believe you at this point. You you'd be better off just telling them that there's a gremlin inside their computer that you're trying to knock out because they aren't believing. They tapped their computer really firmly. They restart the computer, and what do you know? Your operating system starting Now what do you know? Your hard drive? Starting
09:05
that hard drive may have become Miss ceded. That hard drive may have become stuck,
09:09
Um, and by just giving it some
09:13
percussive help, we've sort of pushed it along. When we say tat bar hard drive, we aren't talking about tapping it with a hammer. We just want to give it a firm little push and after that, if we can get it to kit moving, if we can get our operating system to boot,
09:30
we want to scramble to go ahead and back up that data.
09:33
And we want to see about getting that hard drive replaced with one that's a bit more reliable and doesn't require require us to have toe hit our computer in order to get going.

Up Next

Troubleshoot Critical Systems

Diagnosing system malfunctions and finding a solution is an important skill for help desk professionals to develop. Expand your knowledge of the troubleshooting theory in less than an hour.

Instructed By

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Anthony Harris
Systems Analyst and Administrator at SAIC
Instructor