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Windows 7: Windows won't start - system files integrity check and repair 0x490

02 May 2012   #1

Windows 7 64 bit
 
 
Windows won't start - system files integrity check and repair 0x490

A couple nights ago I left my pc on to complete a download and set it to shutdown when it completed. I have done this many times without issue. But since waking up that day, I can not get Windows to start. I have run the start up repair and it is unable to fix my computer. It returns the system files integrity check and repair 0x490 error. I did a system restore from less than a week before and it didn't fix the problem. I have been able to start Windows in safe mode, but that hasn't helped in fixing the issue either.

I recently moved and left my install disk somewhere at home so I am trying to find a way to fix this without having to reinstall Windows. Any help would be appreciated.

My System SpecsSystem Spec
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03 May 2012   #2

Windows 7 Home Premium 64 Bit
 
 

Go through each step carefully from the Troubleshooting Windows 7 Failure to Boot tutorial. Report back as you progress and the results of each step.
My System SpecsSystem Spec
03 May 2012   #3

win7 home premium-64bit-SP1-IE10
 
 

Welcome to the forum
Alongside of what writhziden propose, you can visit this site and see if that can repair your computer:

Run Windows Startup Repair to fix Unable to boot System with error code 0x490
My System SpecsSystem Spec
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03 May 2012   #4
Arc

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium 64 Bit SP 1
 
 

Welcome aboard, rcampana
Quote   Quote: Originally Posted by rcampana View Post
I recently moved and left my install disk somewhere at home so I am trying to find a way to fix this without having to reinstall Windows. Any help would be appreciated.
You need to run Startup Repair , for at least three times with restarts after every single run to fix the corrupted MBR. This suggestion is already included in what writhziden suggested.

In order to get the desired results, you are to run Startup Repair either using the installation disk, or using a repair disk. As you dont have the installation disk ATM, you can download a repair disk from the link specified in the first post of the thread Win7 Repair Disk Download (you need the 64 bit one, as your system is).

Burn the downloaded ISO in a blank disk, boot from it, and run startup repair for three separate times.
My System SpecsSystem Spec
04 May 2012   #5

Windows 7 64 bit
 
 

I've been stuck on step one of the link writhziden posted. I can start in safe mode with networking, and I was able to download, install, and update Malwarebytes. I've tried running a full scan twice now, and both times the program froze up about an hour or so into the process. Up to that point, only one infected file was found, which I deleted, but it was an .exe for a firefox addon I've had on here almost as long as I've had the computer. I don't think the problem is related to malware based on what caused the issue and what I've read about it online, which is an unclean shut down.

I'm not sure if I have any blank discs at the moment so I'll have to look. Is it possible to do it with a USB drive or an external HD if they have enough space?

Thank you for the help.
My System SpecsSystem Spec
04 May 2012   #6

Windows 7 Home Premium 64 Bit
 
 

A USB drive can be used. Similar steps to those outlined in Boot Windows 7 System Repair Disc from USB Using Grub4Dos can be used with other ISOs. That link is to guide you in putting the ISO on USB and making it bootable; you do not need the repair disc parts of the tutorial unless you also want to make a repair disc.

Regardless, I would recommend you skip the malware steps and get straight to the startup repair steps since that is the general consensus from the other people who have offered help. Do the steps in that tutorial I gave in this order: 4 (run the startup repair at least three times with a restart in between each), 3, 6, 8, 9, 10, and if needed: 2, 1
My System SpecsSystem Spec
04 May 2012   #7

Windows 7 64 bit
 
 

I was able to make a bootable USB and am in the process of doing the first of three start up repairs and restarts. Does it matter if they are not in immediate succession? The disk repair can take over an hour and I won't be able to wait here to do the next two.
My System SpecsSystem Spec
04 May 2012   #8

Windows 7 Home Premium 64 Bit
 
 

It is best to run them in succession. Not doing so may lead you back to needing to run three in a row later.
My System SpecsSystem Spec
04 May 2012   #9

Windows 7 64 bit
 
 

Ok I did the first repair, but after I restarted and ran the second repair it said it couldn't find anything preventing Windows from starting. I tried to start Windows normally then but it still didn't work. I'm just gonna have to do this tomorrow because I'm leaving shortly.
My System SpecsSystem Spec
04 May 2012   #10

Windows 7 Home Premium 64 Bit
 
 

Alright, when you do so tomorrow, run the repair three times with a restart in between each even if it says it did not find anything to repair.
My System SpecsSystem Spec
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 Windows won't start - system files integrity check and repair 0x490





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