Avast cant access file on computer cause locked?

It looks like the Alureon rootkit. That's responsible for the Google redirect problem, among other things. TDSSKiller removes it. I've included the other links in case you wish to scan for infections you may be unaware of, but I should think Avast has those covered.

Try this:

Firstly, boot your computer to the Safe Mode menu screen. You do this by repeatedly pressing F8 as soon as you boot up. Once there, use the arrow keys to highlight Safe Mode with Networking. Continue to boot from there, by pressing Enter.

If that's successful, download and run TDSSKiller.exe from Kaspersky Lab. It's tiny, and takes just a minute to run. It hunts down and kills a specific family of rootkits:

http://support.kaspersky.com/viruses/solutions?qid...

Regardless of the results, download the free version of Malwarebytes' Anti-Malware (MBAM). Install it, get updates and run a full scan (still in Safe Mode). This is a direct download link. Copy and paste it into your browser’s address bar, and press Enter.

http://www.myantispyware.com/mbam

After that, boot normally and run another full scan with MBAM. It will detect any malware that wasn’t running in Safe Mode.

If the problem still exists, download and run the free Kaspersky Virus Removal Tool:

http://support.kaspersky.com/viruses/utility

You should now delete TDSSKiller.exe and the Kaspersky Virus Removal Tool, as updated versions are often made available. Malwarebytes' Anti-Malware can be easily uninstalled, should you wish to do so, but it may prove to be beneficial in the future.

Hope this helps.

2

We won't be able to find out if that second one is a threat or not.

But you may have your Firefox (or any other Mozilla application) running while doing the scan. Be sure to close all the applications first while doing a system scan or full scan so the antivirus has all the needed access to all files while doing its job.

Try running a boot-time scan with Avast.

Open Avast by clicking on the orange orb.

In the left and column click on Scan Computer, then click Boot Time Scan, then click schedule now, then restart your computer for the boot-time scan to run.

i wouldnt trust anything avast has to say. i use microsoft security essentials. its free and the best security out there. ive never used avast but have heard nothing but bad things about it. its probly a program error. a win32 file type cannot be threatening. its just a computer file.

I cant identify what is that threat in file name, because its your file type and we dont know what it is, better try to delete it, if you cant reformat system.

you can do a system cleanup and try other softwares like comodo Antivirus