RUNDLL error message "jyku.fjo" on computer start up

MalcolmBishop used Ask the Experts™
Win XP.   Error message on start up...
error loading jyku.fjo
The specified module could not be found.

Every time I start the PC this message is in middle of screen.

I have Webroot Spysweeper and McAfee Internet security for several years and not had a problem with them.
I think the problem started after my IE 8 crashed while on Google, and I think the webpage I was trying to get on had started to load Java, but the PC then froze.
Screen dump attached.
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
For me it looks like a virus infoection.
Open regedit.exe and search for "jyku.fjo" - if it's somewhere in: HKCU\Software\Microsoft\Windows\Currentversion\Run or HKLM\... the same... , then - ust delete it, and full scan your computer.
Also search whole hard drive for such a file and remove it if youfind (for safety reasons - you can create some folder (that is not in your PATH) - and move it there for a while.
Top Expert 2010

Download SuperAntiSPyware, its free and can remove this specific infection.

You need to follow below steps:

1. Registry Editing:
Start -> Run -> Regedit ->HKLM->Software->Microsoft->Windows->Current Version->Run ->
Delete the keys which has the description as above;

2. From System configuration Utility:
start -> run -> msconfig -> startup -> Uncheck the box which has the description as above

3. Delete temp and temporaryinternet files

4. Delete all files from C:\Windows\Temp

Let me know if you still have the issue.

Jay ..
How to Generate Services Revenue the Easiest Way

This Tuesday! Learn key insights about modern cyber protection services & gain practical strategies to skyrocket business:

- What it takes to build a cloud service portfolio
- How to determine which services will help your unique business grow
- Various use-cases and examples


Hi Jay
and temp internet files from 3
but what other temp files do you mean in 3 ?
Current user temp files;

Start -> Run -> %temp%

Delete everything from this place.

Jay ..


Thanks Guys, that solved it.

   Follow these steps to completely delete any trace of this malware.

T Remove jyku.fjo do the following:
1.To enable deleting the jyku.fjo file, terminate the associated process in the Task Manager as follows:
¿Right-click in the Windows taskbar (a bar that appears along the bottom of the Windows screen) and select Task Manager on the menu.
¿In the Tasks Manager window, click the Processes tab.
¿On the Processes tab, select jyku.fjo and click End Process.
2.Using your file explorer, browse to the file using the paths listed in Location of jyku.fjo and Associated Malware.
3.Select the file and press SHIFT+Delete on the keyboard.
4.Click Yes in the confirm deletion dialog box.
5.Repeat steps 2-4 for each location listed in Location of jyku.fjo and Associated Malware.

•The deletion of jyku.fjo will fail if it is locked; that is, it is in use by some application (Windows will display a corresponding message).
•The deletion of jyku.fjo will fail if your Windows uses the NT File System (NTFS) and you have no write rights for the file. Request your system administrator to grant you write rights for the file.

Deleting Locked Files
You can delete locked files with the RemoveOnReboot utility. You can install the RemoveOnReboot utility from here.

After you delete a locked file, you need to delete all the references to the file in Windows registry.

To delete a locked file:

1.Right-click on the file and select Send To -> Remove on Next Reboot on the menu.
2.Restart your computer.
The file will be deleted on restart.

Note: In the case of complex viruses that can replicate themselves, malware files can reappear in the same locations even after you have deleted those files and restarted your computer. Exterminate It! can effectively eradicate such viruses from your computer.

To remove all registry references to a malware file:

1.On the Windows Start menu, click Run.
2.In the Open box, type regedit and click OK. The Registry Editor window opens.
3.On the Edit menu, select Find.
4.In the Find dialog box, type FILENAME. The name of the first found registry value referencing jyku.fjo is highlighted in the right pane of the Registry Editor window.
5.Right-click the registry value name and select Delete on the menu.
6.Click Yes in the Confirm Value Delete dialog box.
7.To delete all other references to jyku.fjo, repeat steps 4-6.
IMPORTANT: Malware files can masquerade as legitimate files by using the same file names. To avoid deleting a harmless file, ensure that the Value column for the registry value displays exactly one of the paths listed in Location of jyku.fjo and Associated Malware.

I hope this works for you! :D

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial