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combofix will not install

a52dragon used Ask the Experts™
combofix will not install
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Robert RComputer Service Technician

try to install it in safe mode.
Also try to run it in safe mode with network and redownload. Some malware will corrupt the download.

If you are able to download try to rename it to setup.exe or explorer.exe or iexplorer.exe since these names are usually not filtered by the malware.

Also try killprocess in windows to turn off any apps you dont need to free up combofix to install:

There is no "Combofix installation": you save it to desktop and then simply run it.

It will, however, try to install the Recovery Console. This is an optional step which you may skip if you have either a working XP installation CD or a complete system backup.
Even when skipping, please make sure you follow this guide: http://www.bleepingcomputer.com/combofix/how-to-use-combofix

Also note that Combofix will not run on server versions of Windows (i.e. Windows 2003).
Sometimes you need to re-name Combofix for it to run on an infected machine. You should be careful to re-name it BEFORE you download it. Download a fresh copy of Combofix from here:


click the download - click on "save"
"Save in" = Desktop
"File Name" = cf.bat
"Save as type" = All files

Now try running Combofix again.
Don't forget that Combofix won't run on 64-bit systems...
Can you be more specific? What OS are you using? does it download and not run or not download at all?
You may need to run rkill first in order to stop what ever is infecting you machine.

I agree with renaming Combofix; that may work. I thought you weren't supposed to run Combofix in safe mode? Please correct me if I'm wrong.
Also, did you try scanning outside of Windows, from a bootable AV CD?
You only run combofix in safe mode if it absolutely won't run in normal mode. Then run it again in normal mode.
How did this pan out?