Can't Fix or Reinstall Windows 7 HomePrm; Missing DLLs

Upgraded from Vista HmPrm to Win7 HmPrm flawlessly. Weeks later a power loss when defrag'g left OS errors; tried to fix with Win7sp1.iso which made matters worse. Now pc will boot but missing dlls leave screen black; can only launch task mgr. Boot'g with iso does not allow Reinstall due to "dvd driver missing".
Error: 0x80070002

DLLs missing and ID'd thus far: System 32\rasplap.dll, UNINIT.dll, slc.dll, WinSxS\x86_microsoft.windows.common_cpmtrols_6595b64144ccf1df_5.82.7601.17514_none_ec83dffa859149af\ com\CTL32.dll, autorun.dll, Net AP132.dll and SYS32\BROWCLI.DLL...maybe more.

I'd like to save the installed software but doubt that can be done...my C-prompt is likely limited use.

My question may really be how to format my HDD, under this circumstance, and reinstall Win7 as only option.

Try Startup Repair - Run up to 3 Separate Times to see if it can find problems to resolve.

If not from the System Recovery Options run System Restore manually to before the problem occurred.

If this fails open the Recovery Options' Command Line to run SFC /SCANNOW Run in Command Prompt at Boot

There are other repair steps in Troubleshooting Windows 7 Failure to Start leading up to if necessary rescuiing your files to run Clean Reinstall - Factory OEM Windows 7 which are the same steps for retail.

Thanks, gregrocker, for your advice. I've tried (and failed) all but your last item which I will now work on.
I experienced spontaneous loss of many DLLs and possibly the cd\dvd driver. I have added a new partition to the drive and made it active but still prompted for a dvd driver that won't install. Using win7x86sp1.iso that i used to upgrade from vistax86.

Why have you made a new partition and marked it Active? This means Win7 will not be able to boot unless you return the Active flag where it was.

Were you trying to reinstall? If it's prompting for drivers during a Clean Reinstall then the installer is bad and needs reburning or rewriting from Clean Reinstall - Factory OEM Windows 7

Good question...new partition in effort to save installed programs, some for which I have no reinstall media. Plus other efforts to repair original partition failed...still working though and can revert to orig. partition if 'clean all' is only option.

What is weird is the media I used to repair performed the upgrade from Vista x86...why then;not now?

Have burned new iso cd with MS download tool. Hope to soon try that.

'Appreciate your advice and hope you continue directing. thank you for all feedback.

Did you check the install DVD to see if it's smudged or scratched?

If you have no other place to store them and must copy out your files to a partition so you can wipe the HD with Diskpart Clean Command, then boot the installer and choose Custom Install, at drive selection screen delete only the System Reserved and C partitions making sure not to touch the data partition. Then click New and the installer will create your install partition along with a small boot partition you can ignore. Format it and click Next to begin install.

If this fails you'll need to copy out your data so you can wipe the HD first with Diskpart Clean Command to try install again, and then if necessary clean again and format an Active partition using Step 2.2 in SSD - HDD Optimize for Windows Reinstallation

Greetings Gregrocker,

The install 3 DVDs are not scratched or smudged. One was used to upgrade from Vista x86 to Win7sp1 x86, one is a new download and burn with MS tool, the other is a Upgrade Windows 7 install purchased directly from Microsoft. All elicit error "CD/DVD missing driver".

I also have a Gateway Recovery DVD that I made originally from this pc.

Data is backed up and followed the 'diskpart clean cmd, format ntfs and proceeded to install. The 3 Windows 7 DVDs elicit the same 'missing cd/dvd driver and the Gateway recovery error = Missing BootMgr.

Next preformed 'Bootrec /RebuildBcd/FixMbr which completed successfully on volume.

Tried above procedure again with like results. I will head to Gateway to determine their recommendations - but I prefer your guidance.

My thoughts: cd/dvd player reads the install dvds, the Missing MBR is puzzling. Could I be experiencing some hardware or Bios problem?

Thanks again.

Missing BootMgr always means disk is not booting, but HD is attempting to boot.
How to Boot A Computer from CD or DVD - YouTube

Unplug all other HD's and peripherals,

Boot into BIOS setup, reset to defaults, save changes. Next if an EFI BIOS, enable Legacy BIOS, set DVD drive first to boot, HD second. Then set SATA controller to AHCI. Save changes and Exit.

Then boot into installer DVD or flash stick burned or written using tool and latest ISO for your licensed OS version here.

At first installer screen Press Shift + F10 to open a Command Box, type:

DISKPART
LIST DISK
SELECT DISK 0 (after confirming Windows 7 target HD #)
CLEAN
CREATE PARTITION PRIMARY SIZE=102400 (for 100gb partition, adjust as desired)
FORMAT FS=NTFS LABEL="WINDOWS 7"
ACTIVE
EXIT
EXIT

Next click Install Now, then Custom install to Clean Install Windows 7 to the partition you created. If it fails then report back at which step and the verbatim error message.

In addition read over these steps to understand the tools and methods which work best to get and maintain a perfect Clean Reinstall - Factory OEM Windows 7. The steps are the same for retail.

After install you can adjust partition size or Create new partitions for data, etc. in Disk Mgmt. We are creating the partition here to mark it Active which overcomes certain install failures.

Thank you for your time, gregrocker. Problem remains. Followed your instructions. Booted into System Setup, at main window chose setup defaults (Intel board Product name DG33sxg2 firmware v. AAD94468-501). At advanced window set SATA to <AHCI>, saved changes and affirmed changes were saved. Optiarc DVD RW A-ATAPI was confirmed as 1st boot item and is listed Primary Master.

Closed c-prompt and proceeded to install, same error displayed: "A required CD/DVD device driver is missing. If you have a driver floppy disk, CD, DVD, or USB flash drive, please insert now. Note: If the Windows installation media is in the CD/DVD drive, you can safely remove it for this step." Upon <RESCAN> error: "No device drivers were found. Make sure that the installation media contains the correct drivers then click ok."

Still stumped. Certain my problems not related to virus or spyware. Used Malawarebytes Anti-malware free, SUPERantispyware free, Avira real-time free, Secunia PSI, winpatrol, windows7 firewall plus regular MS updates.

Several weeks prior to this problem found the Nvidia card loose and ensured it was set properly and secure...that should have no bearing...i think.

Use the latest official installer for your version written to flash stick from Steps 1 and 2 of Clean Reinstall - Factory OEM Windows 7. The driver error is almost always a bad installer so it needs to be replaced to see, and DVD drive needs to be ruled out.

So set HDD first to boot in BIOS, trigger stick to boot using Gateway F10 key at boot, choosing the USB stick under HD, Removable, or USB - you may need to expand an entry to see the actual stick model.

If the problem persists unplug the DVD drive to see if it changes.

If this fails, try running the Recovery disk. If it installs, from desktop run the win7 installer Setup to overwrite C for a much cleaner installer.