recently been given a used pc from a family member and thought I should check it was clean before using.Installed and ran avast anti virus, found various trojans, malware etc.,, removed to chest, ran a couple of more scans and everything appeared ok. For curiosity and confidence loaded yahoo toolbar and ran spyware , results listed antiwpa.dll in c\windows\system32. Deleted and ran spywarE again, each and every time it reappeared. cannot delete manually as it say access denied. Moved file to desktop to workwith,clicked on properties herewith info c:\Documents and settings\abi\desktop size 5.25 kb (5,376 bytes) size on disk 8.00 kb (8,192 bytes) created and modified sat july 15, 2006 12.oo version 3.4.6.0 description antiWPA3 for x86 copyright HLT & CW2K 06, in version info it reads antiwpa7.tk Please to here if there is an easy way to get rid of this file, I have limited experience of pcs and and jargon thanks

Please download Malwarebytes' Anti-Malware from one of these sites: MalwareBytes1 MalwareBytes2 Rename the setup file, mbam-setup.exe, before you download it. To do that once the "enter name of file to save to" box appears as the download begins in the filename box rename mbam-setup.exe to tool.exe> click save. 1. Double Click tool.exe to install the application. 2. Make sure a checkmark is placed next to Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware, then click Finish. 3. If an update is found, it will download and install the latest version. 4. Once the program has loaded, select "Perform Quick Scan", then click Scan. The scan may take some time to finish,so please be patient. 5. When the scan is complete, click OK, then Show Results to view the results. 6. Make sure that everything found is checked, and click Remove Selected. 7. When disinfection is completed, a log will open in Notepad and you may be prompted to Restart. If MBAM encounters a file that is difficult to remove,you will be presented with 1 of 2 prompts,click OK to either and let MBAM proceed with the disinfection process,if asked to restart the computer,please do so immediately. 8. The log is automatically saved by MBAM and can be viewed by clicking the Logs tab in MBAM. 9. Copy&Paste the entire report in your next reply. Please download and install the latest version of HijackThis v2.0.2: Download the "HijackThis" Installer from this link: Hijack This Rename the setup file, HJTInstall.exe, before you download it. To do that once the "enter name of file to save to" box appears as the download begins in the filename box rename HJTInstall.exe to tools.exe> click save. 1. Save " tools.exe" to your desktop. 2. Double click on tools.exe to run the program. 3. By default it will install to C:\Program Files\Trend Micro\HijackThis. 4. Accept the license agreement by clicking the "I Accept" button. 5.Click on the "Do a system scan and save a log file" button. It will scan and then ask you to save the log. 6. Click "Save log" to save the log file and then the log will open in Notepad. 7. Click on "Edit > Select All" then click on "Edit > Copy" to copy the entire contents of the log. 8. Paste the log in your next reply. 9. Do NOT have HijackThis fix anything yet! Most of what it finds will be harmless or even required.