Infected computer

Hello, I am having a hard time fixing my computer. I have Avira, SuperAntiSpyware, and AntiMalware programs but my computer got infected and now I cannot run the programs to remove the problem. It keeps telling me
"WARNING! Application cannot be executed. The file avgnt.exe is infected. Please activate your antivirus software." or it will tell me
"Intercepting programs that may compromise your privacy and harm your system have been dectected on your PC. Click here to remove them immediately with System Tool."
It also changed the the wallpaper of my desktop with more warnings of infections.
The program it tries to get me to sign up and pay for to "remove" the infections is System Tool and it has a padlock for an icon/symbol in the top left corner of the window that opens up. Any help would be much appreciated.

-jhazel

Hello, I am moving this up one forum to Am I Infected.
avgnt.exe is a Windows process part of Avira Internet Security Suite. With the other symptoms you have a Rogue Application infection..

Please follow our Removal Guide here Remove System Tool and SystemTool .
You will move to the Automated Removal Instructions

After you completed that, post your scan log here,let me know how things are.
The log is automatically saved and can be viewed by clicking the Logs tab in MBAM.
Copy and paste the contents of that report in your next reply. Be sure to post the complete log to include the top portion which shows MBAM's database version and your operating system.

Ok, here's the log from MBAM:

Malwarebytes' Anti-Malware 1.50.1.1100
www.malwarebytes.org

Database version: 5460

Windows 6.1.7600
Internet Explorer 8.0.7600.16385

1/4/2011 2:43:46 PM
mbam-log-2011-01-04 (14-43-46).txt

Scan type: Full scan (C:\|)
Objects scanned: 235364
Time elapsed: 26 minute(s), 23 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)

Do you still have the desktop issue?

Run an online scan.
Please perform a scan with Eset Online Antiivirus Scanner.
This scan requires Internet Explorer to work. Vista/Windows 7 users need to run Internet Explorer as Administrator.
To do this, right-click on the IE icon in the Start Menu or Quick Launch Bar on the Taskbar and select Run As Administrator from the context menu.

• Click the green button.
• Read the End User License Agreement and check the box:
• Check .
• Click the button.
• Accept any security warnings from your browser.
• Check
• Check Remove found threats and Scan potentially unwanted applications. (If given the option, choose "Quarantine" instead of delete.)
• Click the Start button.
• ESET will then download updates for itself, install itself, and begin scanning your computer.
• If offered the option to get information or buy software at any point, just close the window.
• The scan will take a while so be patient and do NOT use the computer while the scan is running. Keep all other programs and windows closed.
• When the scan completes, push
• Push , and save the file to your desktop as ESETScan.txt.
• Push the button, then Finish.
• Copy and paste the contents of ESETScan.txt in your next reply.

Note: A log.txt file will also be created and automatically saved in the C:\Program Files\EsetOnlineScanner\ folder.
If you did not save the ESETScan log, click > Run..., then type or copy and paste everything in the code box below into the Open dialogue box:

C:\Program Files\ESET\EsetOnlineScanner\log.txt

• Click Ok and the scan results will open in Notepad.
• Copy and paste the contents of log.txt in your next reply.

-- Some online scanners will detect existing anti-virus software and refuse to cooperate. You may have to disable the real-time protection components of your existing anti-virus and try running the scan again. If you do this, remember to turn them back on after you are finished.

NOTE: In some instances if no malware is found there will be no log produced.