kdcom.dll Windows 7 corrupt with Acer Aspire

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Nightshade123

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Nov 1, 2011
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I keep on getting the message Startup Repair is attempting to fix problems at startup.

Kdcom.dll is corrupt.

I have an Acer Aspire Windows 7 Home Premium and used factory image disks to reinstall.

The program to restore system only asked for 1 of 3 system image disk.

The startup repair screen comes up every 3rd or 4th time I start up.

Otherwise everything runs smoothly.
 
Joined
Oct 20, 2011
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Did you recently install any updates? First try a windows scan: Insert your windows 7> Click start > run> cmd> type: sfc /scannow. Allow it to fully complete the scan hopefully it will restore the .dll file. If that doesn't work again insert your windows 7 reboot and hit f12 boot from cd drive. Wait for the blue screen to appear that asks you if you want to Repair, re-install or esc. Hit "R" (Recovery Console) and when bios screen appears (assuming you don't have an admin pw if you do type that in if not just hit enter) Recovery Console is command based. You'll be asked for the drive that your Windows is installed on. Typically its "1" unless you have multiple installs.When you get to the prompt i.e, C:\WINDOWS>,then type: chkdsk /r

Let me know if this installs
 

LagunaGTO

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Jan 27, 2011
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EDIT: Do Post #2 first and then this if that does not work.

Boot From Disk
Insert your Windows XP disc and boot from it. If you don't know how to boot from a disc, during the Sony splash there is, hopefully, a legend that pop's up briefly (most often at the top right of the screen but not always). It will usually say two things: SETUP and BOOT MANAGER. Next to those will be the keys to press to start either. Press the one for the BOOT MANAGER. Unfortunately its not the same for every computer, but usually its something like F10 or F12.
Enter Repair
So once your fully booted into the XP disc, you'll have three options. Choose the REPAIR option by pressing R.
Select Installation
Recovery Console is command based. You'll be asked for the drive that your Windows is installed on. Typically its "1" unless you have multiple installs.
CD Drive Letter
When you get to the prompt C:\WINDOWS>, you will need to figure one thing out before moving on and that's what your CD drive letter is. Try typing "D:" without quotes. When D:\> comes up, type "DIR" without quotes. If a list comes up that has "I386" in it, then remember your drive letter is "D." If not then replace "D" in the above directions with "E."
The Repair
Once you have found your disc drive letter, follow each of the following commands line by line.
C:\WINDOWS\>CD system32
this will move you to the system32 folder
C:\WINDOWS\system32>COPY kdcom.dll C:\
this copy is a backup in case things don't work
C:\WINDOWS\system32>DEL kdcom.dll
this will delete the original not the backup
C:\WINDOWS\system32>COPY D:\I386\kdcom.dl_
replace the D if you have to with whatever your disc drive letter was above. the kdcom.dl_ is not a typo either.
C:\WINDOWS\system32>REN kdcom.dl_ kdcom.dll
renames kdcom.dl_ you copied to kdcom.dll
C:\WINDOWS\system32>EXIT
reboots your computer.

If all is right in the world, you should be able to boot right up without issue.
Substitute XP for Windows 7. It's going to work the same.

Source
 
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