BleepingComputer.com: Norton Antivirus has been disabled and won't restart

Hi,

My computer is running Windows 7 Professional and I have Norton Security Suite installed. The control panel says that Norton's spyware protection and virus protection have both been turned off, and when I try to turn them back on, or start Norton directly, I get this message:

C:\Program Files\Norton Security Suite\Engine\4.3.0.5\uistub.exe

The request could not be performed because of an I/O device error.



I just recently downloaded and installed Firefox 5. Not sure whether or not it's related, but the timeline is close.

Any help would be much appreciated.

Thanks,

Connor

first of all download malware bytes antimalware at malwarebytes.org
then update it then run a quick scan then post the logs

Thanks for the help.

Here is the log from the Malware bytes scan:

Malwarebytes' Anti-Malware 1.51.0.1200
www.malwarebytes.org

Database version: 6967

Windows 6.1.7600
Internet Explorer 8.0.7600.16385

6/28/2011 2:33:55 PM
mbam-log-2011-06-28 (14-33-55).txt

Scan type: Full scan (C:\|Q:\|)
Objects scanned: 389708
Time elapsed: 1 hour(s), 42 minute(s), 40 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)


And now when I try to open Norton, I get the following dialog box:

Windows Security
---------------
These files can't be opened.
----------------------------
Your Internet security settings prevented one or more files from being opened.

C:\Program Files\Norton Security Suite\Engine\4.3.0.5\uistub.exe
------------------------------------------------------------------------------

Why can't these files be opened?


Any ideas on the next step? Thanks.

See the solution here. This is most likely not malware. }} L@@K