CaptainSlocum

Ok, I've done all that, thanks Treed. FYI, the only apps I have installed in the last few day were Remember The Milk and DiskCatalogmaker. That last one I had my doubts about - it installed the app into the applications folder but nothing appeared in launch pad. It also works at quite a low level presumably to be able to catalogue hard drives. I didn't catalogue my main hard drive with it, just a few external drives I keep my film making archives on. If it didn't come in through those, what other way could it have got onto my system? Thanks for your help.

Treed wrote: "Just a note... this would not be any kind of "automatic download." It would be something the user was tricked into downloading and installing, such as a fake Adobe Flash Player installer (which is still one of the most common scams used)." I did not download or install anything for days. Then when I turned on my computer this morning, MixBuilder self-installed. I still have MixBuilder.app in my trash if you can tell me how to get it to you (in non-techie language please). It won't drag to your attachment target window.

In the past MWB has taken about 10 mins to do a quick scan. Suddenly it started to never finish (last scan went up to over 7 hours and over 7 million objects scanned before I stopped it (see log below). I uninstalled and downloaded and installed MWB again - same problem. I have not altered the scanner settings, all this is on drive C. The scanner shows a weird non-existent file path after a while as well (eg. Currently scanning: C:\DOCUMENTS AND SETTINGS\\ADMINISTRATOR\START MENU\PROGRAMS\STARTUP\Administrator\Administrator\Administrator\Administrator\Administrator\LogMeInRemoteUser\Default User\Default User\ALL Users WINDOWS\Shortcut to Documents and Settings.Ink) . I close down Avira while it scans and all other programmes. I have Windows XP SP2. Have I got a virus that has hijacked Malwarebytes and sent it into a loop? Malwarebytes' Anti-Malware 1.50.1.1100 www.malwarebytes.org Database version: 6283 Windows 5.1.2600 Service Pack 2 Internet Explorer 7.0.5730.11 06/04/2011 18:14:56 mbam-log-2011-04-06 (18-14-56).txt Scan type: Quick scan Objects scanned: 7640486 Time elapsed: 7 hour(s), 5 minute(s), 13 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)