Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Boot Critical File c:\\ci.dll Corrupted - HELP!

20 May 2011   #11


Copy & Paste - in Windows Recovery Console

SSD - HDD Optimize for Windows Reinstallation

Reinstalling Windows 7

My System SpecsSystem Spec
20 May 2011   #12

Win7 Home Premium 64bit

wow, great info, thanks!
My System SpecsSystem Spec
11 Aug 2011   #13

win7 64
If you are getting constantly looping Startup Repair in ordinary boot and in SAFE mode and a report of a ci.dll problem, see this thread. The ci.dll file is not the trouble. It opens a kernel file and if that has a problem you will get the ci.dll fault report.
The problem is usually caused by downloading stuff from the net that contains a very nasty rootkit virus/trojan. It is often in a .rar file. This is not spotted by a lot of virus killers, It overwrites your boot and drive headers so there is no easy way to kill it.
My thread gives you more info on what to do and what not to waste your time on.
My System SpecsSystem Spec

26 Aug 2011   #14

Windows 7 Ultimate 64-Bit

Just going to be honest here about how I got the infection, detected it, and removed it.

I am usually a very careful browser but I got sloppy and picked up the the boo/tdss.m trojan while browsing some of the more dangerous pornsites out there in search of legal but obscure content. While browsing my pc crashed and re-started in Startup Repair tool, kept looping and when I looked in details it was the ci.dll issue.

Found this thread and did not have a way to open up HD and remove it "remotely" by opening it as a slave drive on another PC.

I used the Avira Rescue Bootdisk to confirm I had the boo/tdss.m rootkit.

After searching around how to repair boot records I found out about Bootrec.exe (a built in windows executable)

After getting into the command prompt via a install disc(you can also access it after the Startup Repair tool "gives up" on trying to remove it "Advanced Tools"), I was able to run 'bootrec /fixmbr' which re-wrote the boot sector.

That fixed the ci.dll error, allowing me to boot into windows and also apparently completely removed the trojan as I am not getting anymore detections on any scan. I am glad this worked as I have lost my win 7 upgrade disc/key and would of been without a legitimate license if I had to re-install.
My System SpecsSystem Spec
26 Aug 2011   #15


Install, update and run full scan with Malwarebytes
to be sure you've gotten rid of infection since bootrec commands cannot remove it.

Next uninstall your failed AV, install Microsoft Security Essentials,
run a full scan.
My System SpecsSystem Spec
27 Dec 2011   #16

Windows 7 Home Premium 64bit

I don't see any option how I can send PMs here so...

Iamien, THANK YOU.
So ****ing much thank you. Man, you saved me. Awesome, fix was instantaneous, I typed the command, clicked Enter, restarted PC and everything works fine.
My System SpecsSystem Spec

 Boot Critical File c:\\ci.dll Corrupted - HELP!

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar help and support threads
Thread Forum
Windows Won't Boot- Corrupted Windows File
Greetings, I recently bought a new graphics card and hard drive. Yesterday I installed some new drivers for my graphics card, and they installed fine. I played a game for about an hour or so, and then saw Windows had an update available, so I shut down my computer. Upon start-up I got the option...
General Discussion
Boot critical file is corrupt
The problems started yesterday when my computer went to blue screen and automatically shut down and restarted. This happened twice, then I did an AVG scan in Safe Mode. It placed several infections and a few malwares into the virus vault. However, it "did not test" dozens of files because they were...
General Discussion
Boot Critical File
It seem I have the same problem as GW7777 C;\CI.dll Corrupt if any one could help I would really appreciate it. I have a Asus 64 bit laptop. When I tried Sfc/ scannow it kept telling me one is pending. I tried the dvds that came with the laptop but they wont even open up please help:(
BSOD Help and Support
XP boot error: missing or corrupted file system32\driver\pci.sys
Hello! I converted an old XP machine to a VHD with disk2vhd. Once imported into virtual pc the machine starts up but fails before booting with the message: missing or corrupted file: system32\driver\pci.sys I've searched the internet and can not find a solution to my problem. Does anyone...
Computer won't restart: "Root cause found: Boot critical file D:\CI.dl
I was using the computer when all of a sudden it shut down. When I turn it back it on, it automatically tries to do a Startup Repair. After several minutes, I get the message: "Startup Repair cannot this repair this computer automatically." When I click on "View problem details," everything looks...
BSOD Help and Support
Critical file sharing issue
Quick background: I've been an IT admin for a major university for the past 12 years managing 300+ Windows and Mac user machines. So, this likely isn't your average network connectivity/name resolution/permissions/firewall issue. I have an important user's Windows 7 Enterprise (32 bit) machine...
Network & Sharing

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 05:44.

Twitter Facebook Google+

Windows 7 Forums

Seven Forums Android App Seven Forums IOS App