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

Greetings Gregrocker,

Followed your instructions: downloaded fresh iso and installed on usb drive then booted troubled pc via usb. booted and began install. After choosing 'custom install' installation began then after 9% at 'Expanding Windows Files' an

Error Message: Windows cannot install required files. The file may be corrupt or missing. Make sure all files required for installation are available and restart installation.

Error Code: 080070570

shut down and restarted from usb, same error occurred. Going to unplug cd/dvd drive and replug to see if it will work...thanks again.

The installer is likely bad. Confirm the ISO size and write to stick using UltraISO Software To Create Bootable USB Flash Drive.

Can you try DVD install?

Thanks, gregrocker,

after my last post i did try cd install, also tried the original vista recovery disk. Both efforts failed in same manner as the earlier attempt. the cd install ended immediately after <install> with same missing cd driver error. the recovery said 'no mbr, use control, alt, delete to restart'.

there was one different problem when i tried the cd iso install, the pc scrn froze midway in loading software. that happened twice before it loaded the software and gave me the language scrn. my concern is growing that a hardware problem may exist.

headed to Ultraiso to give it a go.

as always, thanks for your time and skill.

If stick written by Ultra errors out similarly then test your HD with Data Lifeguard Diagnostic for DOS (CD) extended CD scan.

If it checks out OK test your RAM - Test with Memtest86+ for 5-6 passes or overnight.

Then move HD to another PC to run a full Disk Check, then wipe it with Diskpart Clean Command. This should force the installer to start itself when you move HD back.

If no other PC boot free Partition Wizard bootable CD to run Check File System on all partitions, or create one large partition to run it on. Then Quick Wipe the HD from Disk tab, create new NTFS primary partition, rightclick it to Modify>Set to active, OK, Apply. Reboot into installer which should autostart to begin install.

Ultra stick error-ed out. 'had trouble getting to cd drive at c-prompt and opted to run Memtest 86+ v4.20 first.

DOS scrn freeze at Memtest 7:36 Walltime on first try. Second try scrn freeze at 22:12 Walltime.

Third try Memtest scrn freeze at 3:02:49 Walltime on Test 7 Random number sequence, Pass 5, found 158 errors but did Not identify channel...i could only see errors 150 to 158. No errors were found until late in Pass 5.

Do you agree I need to get new memory? I am concerned that there may be a board or power unit problem, especially since a channel was not identified...of course I could not see errors 1-149.

My problem with the cd may have been due to using the win7 install disk to 'repair' in order to get to c-prompt. Perhaps i need to burn a dos boot cd instead.

Use the installer DVD for your licensed version for repairs and to have for reinstall: Clean Reinstall - Factory OEM Windows 7

Follow the RAM - Test with Memtest86+ tutorial to test sticks and slots to isolate the problem. If it's stick(s) then replace it, making sure it's spec'd correctly. I google the mobo or PC model + RAM upgrade to compare results, confirm with Crucial System Scanner software to find out what type of memory is in your computer to get definitive specs before ordering online.

Even better is to go to a Tiger Direct, CompUSA parts counter or PC shop to have them confirm specs since it's much easier to take back if wrong.

Install the chipset from the gateway Support Downloads webpage for your model PC here: Gateway Support - Downloads & Support Documents - Desktop / GT Series / GT5628.

Have you run all IMportant and Optional Updates after enabling Automatically deliver drivers via Windows Update (Step 3) as specfied in the tutorial to get a perfect reinstall? There will be several rounds with reboots.

Have you tried both RAM sticks in A bank slots? Consult your Manual on the Gateway Downloads webpage for your model. I'm not absolutely sure since every mobo is different but you can try it. Ask in our hardware forum if it fails to register or messes up performance. It might also advise you by running Crucial System Scanner software to find out what type of memory is in your computer.

I also asked my buddy Dave who's a top RAM expert here to consult.

Greetings Dave76,

Thanks for your input. Refurb no longer under warranty. I have ran both RAM cards in bank A slot 0 and also both installed: 1 in bank A slot 0 and 1 in bank B slot 1 through at least 11 passes and both ways zero errors. Used bottom clip from bank A slot 1 to insert into top clip recess at bank B slot 0 but haven't been able to seat.
Used Crucial Scanner to ID Ram -ddr2 667 mhz.

Also set MS update to install all drivers + updated chipset driver software at Gateway.

Continue to have errors when trying to backup data and image with error 0x8007045D. Reviewed and used fix recommended in MS support pps. which was Chkdsk/R C: and again for external WD 2.5Tb drive. Result: same error. Getting another error 0x8078002A - headed back to MS support for possible fix. Plan to try to run backup w/ image to DVD and hope it works. DVD drives may still have problems but plan more checks.

I fear commercial driver software but read good reviews of 'driveeasy', that will be a last resort, if ever. Still have the problem with PCI simple communications controller and under devices and printers the PC has a yellow ! problem sign.

Gateway lists a number of BIOS updates for the board, but it appears an Intel board BIOS has been installed and not sure which Gateway BIOS is the equal...don't know if a BIOS can be flashed 'backward' (just in case I pick an older one by mistake). Kinda stuck here but still working to make things right.

Thanks to you and gregrocker for fine advice.