Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Cannot boot up (stops at disc.sys)

15 Apr 2010   #1

Windows 7 Ultimate
Cannot boot up (stops at disc.sys)

I hope this is in the right forum, I am sorry if I am mistaken.

Let me tell you exactly what happened.

Yesterday I clicked to restart my computer and it said updating windows, don't restart or turn off your system.

It was on 1 of 9 and it sat there for a while but eventually I noticed it was on 3 of 9.. then it didn't go any farther and I figured I'd just let it sit there..

Eventually though the monitor went black and wouldn't do anything. After a bit it got shut down due to a power blink.

When I went to turn it back on it went to the screen that says "Starting windows". Usually that little colorful windows logo would pull up but it wouldn't get past that point.

When trying to repair it says "loading files" or whatever and fills the bar and just sits there infinitely.

When pulling up safe mode it stops at "disc.sys"

So I tried putting in the Windows 7 ultimate 64 bit install disc and boot from it goes through the loading files and after that goes to the starting windows screen and stops.

I also have a laptop on the same so I created a recovery disc on it and it does the same thing with this.

I don't know what to do now.. If I can't pull up the install disc at all, what other options are there?

Thanks for any suggestions, I am up for trying almost anything!

I really don't want to wipe the hard drive and start with a fresh install, so I am hoping to have to do it without doing that.

I am downloading ubuntu right now so that I can at least get the last of the files that are not backed up already in case there is no other way.. but this is also assuming that a wipe would even work..

Ok, I think I supplied all of the info. Thanks in advance!

System Recovery Options on here under boot from the install disc it just stalls before I can get to step 3.. which of course was the first thing I wanted to try.

My System SpecsSystem Spec
15 Apr 2010   #2
Microsoft MVP


Try these bootable hardware diagnostics:
H/W Diagnostics:
Please start by running these bootable hardware diagnostics:
Memory Diagnostics (read the details at the link)
HD Diagnostic (read the details at the link)
My System SpecsSystem Spec
17 Apr 2010   #3

Windows 7 Ultimate

I did some memory tests, they are all fine.

Unfortunately my partitions must be screwed up because my HD isn't corrupt and ubuntu isn't loading.

I had an issue exactly like this last year, it was my video card drivers.

this one stops at disc.sys which is also a driver..

Is there any way just to replace the drivers somehow?
My System SpecsSystem Spec

18 Apr 2010   #4
Microsoft MVP


Disc.sys is a driver for your hard drive - have you run the hard drive diagnostics that I suggested?
My System SpecsSystem Spec
19 Apr 2010   #5

Windows 7 Ultimate

The HD is a western digital caviar blue 640g

I downloaded the "Diag504fCD.iso" from the site, but it wouldn't run a diagnostic.

I figured "Acronis True Image WD Edition" would be what I needed, but it is an exe file, so I don't know how that would properly run on a CD since it isn't an iso.

I don't want to sound dumb, but if it is a hd driver, am I at risk of losing the files? As far as I can tell it is just a driver issue and the files are there, but I am of course concerned.

The fact that ubuntu won't load, I am assuming is because of a partition issue. I had to rebuild about a year ago when I was running vista and my video card driver crashed.. so I had installed ubuntu and installed windows7 over it, so that makes sense that the partitions would all be screwed.

Is there anyway to reinstall the drivers?
My System SpecsSystem Spec
19 Apr 2010   #6
Microsoft MVP


Run either the Hitachi Drive Fitness Test or the SeaGate SeaTools test
My System SpecsSystem Spec
20 Apr 2010   #7

Windows 7 Ultimate

Oh, I should have posted a reply so as not to waste your time :)

I purchased an identical HD and will do a swap and install windows as it was on it. I have purchased an enclosure for the one that is in there and will transfer the files that way. I will then wipe the drive so that if this happens again I will have it there.

Thank you for all your help! I just felt this was less of a risk then accidentally wiping my drive and losing my files.
My System SpecsSystem Spec
20 Apr 2010   #8
Microsoft MVP


FWIW - I just posted a link to my copy of the W-D ISO at the link above.
As with anything that you download from the web, please be sure to scan it with an updated antivirus program before opening it.

FYI - here's the link:
My System SpecsSystem Spec
22 Apr 2010   #9

Windows 7 Ultimate


btw, it wasn't the Hard Drive. I mounted a new one and the same issue persisted so now I need to figure out why it isn't booting up.. I don't know if something got disconnected or died in it...
My System SpecsSystem Spec

 Cannot boot up (stops at disc.sys)

Thread Tools

Similar help and support threads
Thread Forum
Win 7 installed boot on Disc 1 and system on Disc 0 separate HDD's
After MUCH searching, I've yet to find info on this issue. Many similar, but nothing specific. Please bare with me if this is a known/solved issue. Okay, old C drive was failing, so I decided on a new OS copy and new HDD. Bought an OEM Win 7 Home Premium 64, and installed. Little did I know,...
Installation & Setup
Creating Repair Disc Stops - no error code
New PC - Win 7 Pro, 64 bit ... start the Create procedure but before I can specify the C disk as the source, Windows stops the program with no error (copy attached). The computer is still 'active' (i.e not a hang). What to do? My previous PC had Win Home and I have the Repair disk for that - as...
General Discussion
Trying to create a system repair disc, application stops working
As title says, when I try to burn a system repair disc the program stops working Problem signature: Problem Event Name: APPCRASH Application Name: recdisc.exe Application Version: 6.1.7600.16385 Application Timestamp: 4a5bc512 Fault Module Name: ole32.dll Fault...
Performance & Maintenance
check disc stops on its own suddenly
when i ran check disc for c drive today, it paused at 11% on stage 4 at file 8401 for a very long time. i let it be that way but after a time the screen suddenly turned blue & before i could read what was written the computer rebooted. it ran a disc check again but this time too, the same sequence...
Performance & Maintenance
Disc parition issue, want System and Boot to be same disc
Hey guys, I am having somewhat of an issue with my disc partitions after backing-up data and reinstalling windows 7-64bit. I have included a picture to help explain. Here's the issue, my PC had a virus I was unable to resolve. I took it to an "expert" to see what he could do. He backed-up...
Backup and Restore

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 12:27.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App