Well echospin seems to be a rootkit installation for media and content licensing control.. It is listed in several places.. This is the thing though.. unless you know what it was installed with, or if you have used a Universal media Disk for anything this should not be present..
Do not remove anything with Hitman Pro...
The Suspicious one means that Hash File or digital signing of the file as noted by the scanner does not match.. This means it could be patched or not what it says it is...
It would be good to hunt down the locations of these files for future reference.. paste them in a notepad document or something.. Verify the file information is in place and correct.. Some installations will drop files that can be searched for and called something else..
Personally I would remove the echospin.. nothing really good about it.. but this could be relative to programs and devices..
Avast I am sorry is crap.. when it isn't detecting false positives.. its missing aspects all together... I prefer ESET Smart Security.. it has all aspects considered and has the best set of settings available.. Avira is free and good but I would consider getting a Security Suite when you can.. and also . a lot of people like Comodo Firewall.. I personally don't.. I have everything I need in one suite..
The next thing you need to do is go to http://free.antivirus.com/hijackthis/
and download 2.0.4.. do a Scan after installation and save the log file.. then give me a link to take a look at it as it may be quite the post for GTVault and .. lengthy.. I will send it back with things you may need to fix and I may also have some questions.. I would recommend using a file server or even your site.. its what I am going to do...
Also is you have XP ...SPyBot Search and Destroy will what you need to download and scan with next.. You have to go to advanced settings n the program and check all file sets to check for and scan for infections, you will not need to install or use the tea time or immunize your system.. Makes your hosts file too large... main thing this will do is scan your registry and look for known infection entries and has several other tools.. This can help chase down the problem..
A really bad infection will result in having to boot with a Boot CD like Hirens or something and ripping out or deleting the files.. especially f they keep coming back...
Most people would just reinstall the OS.. but you may not be prepared to get your files off the machine.. and you could lose everything.. so it may not be what you want to do..
Anyway lots of yammering.. sounds like a lot but it really isn't.. compared to some issues.. LOL
Get those programs DL'ed and hit me back..You could also check out nsane.forums for some help.. especially on the AV/Protection thing..
AVG has has some good numbers as well and has a free version BUT it is only AV..