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Windows 7: Unable to mount ISO as virtual CD-ROM

23 May 2014   #11
jchap1590

Windows 7 Professional, 64-bit
 
 

Quote   Quote: Originally Posted by Kari View Post
Quote   Quote: Originally Posted by jchap1590 View Post
Quote   Quote: Originally Posted by UsernameIssues View Post
I use Virtual CloneDrive (Freeware).
(Near the bottom of that web page.)

If that does not install for you, then it might be time for this: SFC scan.

SFC found corrupt files but was unable to repair them, any suggestions? CBS.log attached

thanks
SFC with /SCANNOW switch needs often to be run several times. Three - four times is totally normal, sometimes even more. This is also clearly told in the tutorial. My rule is: after an SFC /SCANNOW run, if not all errors were fixed, reboot and repeat, although not every geek sees the reboot in between the SFC runs necessary.

This quote from the SFC tutorial:

Quote:
Note   Note
  • If SFC could not fix something, then run the command again to see if it may be able to the next time. Sometimes it may take running the sfc /scannow command 3 or more times to completely fix everything that it's able to.
  • If not, then download and run the 32-bit (x86) or 64-bit (x64) System Update Readiness Tool for your same installed 32-bit or 64-bit Windows 7, restart the PC afterwards, and try the sfc /scannow command again.
  • If still not, then try using OPTION ONE above to run the sfc /scannow command at boot.
  • If still not, then you can attempt to run a System Restore using a restore point dated before the bad file occured to fix it. You may need to repeat doing a System Restore until you find a older restore point that may work.
  • If still not, then you can use the steps in the TIP box in the OPTION THREE section below to manually replace the files that SFC could not fix if there are not to many fix.
  • If there are to many files to manually fix, or you prefer not to use OPTION THREE below, then you could do a repair install without losing anything.
  • If you would like to get help with your SFC issue, then be sure to upload and attach your sfcdetails.txt file from OPTION THREE below in your post.
thanks for the tip. I usually run SFC at least twice if there are errors found. I will run it a few more.

I assume the method for running an SFC scan at boot would be from within Windows Recovery Environment command prompt?


My System SpecsSystem Spec
.
23 May 2014   #12
UsernameIssues

W7 Pro SP1 64bit
 
 

Quote   Quote: Originally Posted by jchap1590 View Post
~~~
I assume the method for running an SFC scan at boot would be from within Windows Recovery Environment command prompt?
Yes and there is a tutorial for the too:
SFC /SCANNOW : Run in Command Prompt at Boot
My System SpecsSystem Spec
23 May 2014   #13
jchap1590

Windows 7 Professional, 64-bit
 
 

Quote   Quote: Originally Posted by UsernameIssues View Post
Quote   Quote: Originally Posted by jchap1590 View Post
~~~
I assume the method for running an SFC scan at boot would be from within Windows Recovery Environment command prompt?
Yes and there is a tutorial for the too:
SFC /SCANNOW : Run in Command Prompt at Boot
I ran the SFC scan about 6 times, I will try this when I am able.

I went to recreate my Windows UEFI USB stick and it fails on "xcopy [source]:\* /d [target]:\ /s /e" command. this is on a separate machine that has an ODD, copying a Windows 7 DVD to USB flash drive.

"overwrite bootmgr? (yes/no/all)"
enter 'y' or 'a'
"access denied"

one problem after another.. *sigh* can't win somedays
My System SpecsSystem Spec
.

24 May 2014   #14
jchap1590

Windows 7 Professional, 64-bit
 
 

When I followed the guide for running an SFC scam at boot, I was confused by the /offbootdir switch because my system reserved partition did not have a volume letter. I assigned one so I could run the scan and now the BCD is all screwed up because for some reason it's assigning C: to the system reserve and F: to the Windows partition.

This is so discouraging. None of the guides I look at seem to have the same options I'm given when I follow the steps.
My System SpecsSystem Spec
24 May 2014   #15
UsernameIssues

W7 Pro SP1 64bit
 
 

When it rains; it pours :-)

Sorry that things are not going as desired. I'm not sure what the cure is - so let's see if others can help you.
My System SpecsSystem Spec
24 May 2014   #16
gregrocker

 

The drive letters are often different in boot mode than in Windows. This is to be expected.

Much easier to use Option One to automatically create UEFI Bootable USB Flash Drive - Create in Windows

Have you already run SFC from inside Windows? That should be sufficient.

If SFC fails to repair files after three times running then you might want to skip to a Repair Install. Be sure to back up a System image and your files first.
My System SpecsSystem Spec
25 May 2014   #17
jchap1590

Windows 7 Professional, 64-bit
 
 

Quote   Quote: Originally Posted by gregrocker View Post
The drive letters are often different in boot mode than in Windows. This is to be expected.

Much easier to use Option One to automatically create UEFI Bootable USB Flash Drive - Create in Windows

Have you already run SFC from inside Windows? That should be sufficient.

If SFC fails to repair files after three times running then you might want to skip to a Repair Install. Be sure to back up a System image and your files first.
yes, I ran the SFC scan from within Windows several times and moved onto running it at boot, as another member suggested. I was confused by this guide: SFC /SCANNOW : Run in Command Prompt at Boot

I used method 2..

"If you are dual/multi booting or have a System Reserved partition as I do and the system boot files are stored on a separate partition than the Operating System partition needing repair, in any case, the volume drive letter where the system boot files are stored goes in the first part."

I could not get the /offbootdir switch to be accepted without A) pointing it to my System Reserved partition, since \Boot\BCD does not exist on my Windows volume, and B) without assigning a volume letter to my system reserved partition.

I don't understand many of the guides or instructions for using bootrec or bcdboot commands because they seem to point the boot directory to the same root as the Windows directory, which is not how Windows 7 installs by default. again, by default, the System Reserved partition is not assigned a drive letter specifically so that those crucial files are hidden yet every guide whizzes right past the part where THE SYSTEM RESERVED DOES NOT HAVE A DRIVE LETTER

I almost feel like, because I assign the system reserved a drive letter, there are now 2 active partitions and Windows no longer knows which one contains the boot configuration. when I type bootrec /rebuildbcd it finds 0 Windows installations.

I'm confused by a few things, and the lack of a ODD plus this being a UEFI install is making all of the information I can find even more confusing. I don't understand how the specific commands for rebuilding the BCD (bcdboot, bootrec, bootsect) rely on the system reserved partition having a drive letter when there isn't one assigned by Windows automatically, even in PE.
  • I need to know the commands to delete the BCD store and all of the boot files. both off the System Reserved and Windows partitions. I want to make sure I'm starting completely fresh
  • I need to know the commands to rebuild the BCD with System Reserved as boot directory (which I suppose will need a drive letter? still confused by that) and C:\Windows as my windows directory (or whatever drive letter it will show as in WinPE)
My System SpecsSystem Spec
25 May 2014   #18
gregrocker

 

The normal boot Repair regimens (mostly developed here) don't apply to UEFI installs which has no MBR. BCD System Store Settings for UEFI

I would run Startup Repair a few times to see if it finds anything to repair, rely on backup imaging and real-time file backup like in Sync, Backup and Store your Files to the Cloud with Skydrive - Windows 7 Forums.

This is another reason I don't mess with the unnecessary UEFI crapware created to support a Secure Boot environment in Windows 8 and used mainly as a promotional tool that fizzled badly. Business for example, which must run secure Servers to get insurance, ignored the scare warnings and is skipping Win8 to move almost entirely from XP into Win7. They also avoid UEFI for mass deployments.

What I would do is Bypass UEFI to Re-Install WIn7 taking the opportunity to do a perfect install as compiled in Clean Reinstall - Factory OEM Windows 7 which steps are the same for retail.

Otherwise to salvage your present install I'd move to the Repair Install if you have followed all the steps in SFC /SCANNOW Command including trying to identify damaged files to replace them. Frankly however I never waste time with this as it can drag on for days when a Repair Install or taking the opportunity to finally get a perfect install can be done in half the time.

Hope this helps. Keep asking back all the questions needed.
My System SpecsSystem Spec
25 May 2014   #19
jchap1590

Windows 7 Professional, 64-bit
 
 

I'll just do a clean install. The machine with the BCD issues in an HP OEM install, which seems to be UEFI. The machine had been unable to create system images or shadow copies since the OS newly installed, perhaps because the backup partition had to be create as a logical drive since the HP install create 3 primary partitions. Or, maybe the BCD got moved to the logical backup partition, I have seen VSS failures when Windows moves the BCD tho another partition which is present at install.

Thanks
My System SpecsSystem Spec
25 May 2014   #20
gregrocker

 

Can you post back a screenshot of Disk Management - Post a Screen Capture Image.
We'll be able to spot any problems and confirm if its a UEFI install by the presence or lack of an EFI System partition.

There are known issues with MBR installs of the System Reserved getting clogged due to writes enabled by a drive letter, resulting in image and shadow copy failure.
My System SpecsSystem Spec
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 Unable to mount ISO as virtual CD-ROM




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