Java Virtual Machine Launcher__Unable to access Jarfile C:users\user\jnana.\jnana.tsa__

Question

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Ideas:

• This happened after I downloaded a YouTube video that I thought was sent by a friend, but her acct. was hacked When I went to view the video, my Sony Vaio Windows 7 shut down.  I have tried uninstalling and reinstalling Java,  but still get the message when I sign on.

Programs you are having problems with

• Error messages
• Recent changes you made to your computer
• What you have already tried to fix the problem

Answer 1

Hi Wendygsd,

·        Do you get the message when you login to Windows or YouTube?

·        Did you download the latest version of Java?

Uninstall Java again from the computer and make sure you download and install the latest version. But first run an online virus scan.

**Step 1:**Try running an online scan and check if that helps.

Safety Scan for Windows Vista and Windows 7

Malicious Software Removal Tool | Protect Your Computer

**Step 2:**Refer the below mentioned link on how to uninstall Java from the computer.

How do I uninstall Java on my Windows computer ?

Also see:

Uninstall or change a program

**Step 3:**Refer to the below link to download and install the latest version of Java.

Download Java for Windows Internet Explorer

Please provide more details as when the error pops up so we can help you in a better way.

Hope this helps!

Syed N – Microsoft Support

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Answer 2

Hi Wendygsd,

Syed was right to have you scan your machine for Malicious Software.  It looks like you may have been infected with this virus Trojan.Jnanabot. Perhaps your Antivirus deleted the virus file but didn't do a good job of cleaning up the startup entry.

If you are still having problems, follow the manual clean up steps here:

http://www.symantec.com/security\_response/writeup.jsp?docid=2010-102616-4246-99&tabid=3

Step 4 may solve your problem.

**NOTE: this is an information stealing virus and is known to log keystrokes. Once you are sure the infection is cleaned it is a good idea to change ALL of your passwords (banking, work related, email, etc.)

Good luck!

Source(s):

Symantec Trojan.Jnanabot writeup: 

http://www.symantec.com/security\_response/writeup.jsp?docid=2010-102616-4246-99&tabid=3

Symantec Blog post:

http://www.symantec.com/connect/blogs/trojanjnanabot-trojanaffecting-multiple-platforms