Serving-sys.com problem

[#1]

Hi
This seems to be my day for sorting out problems.  Over the last few days, every time I start up Firefox, I get an AVG warning about the above (and an Adtech cookie) I have tried clicking on the heal and virus vault buttons, but it keeps happening.  At the same time, Firefox started to clear all my auto-logins every time I closed it down, so that for instance, i have to log into this site, each time I come here.  I've done a full AVG scan, and also a Spybot scan.  I've also tried clearing all the private data on Firefox, and blocking serving-sys.com in the Windows firewall.
I tried googling it, but every site that comes up has a link below saying "this site may harm your computer" and won't let me go to it!
I've also uninstalled the Lavasoft Adaware Anniversary edition, because the problem seemed to co-incide with me installing that.
What next?
John

[#2]

Hi John

Might be worth removing Firefox and reinstalling in case your install has been damaged by something that is now no longer present.

[#3]

that was an  old problem Mitch - to do with Google, only lasted a few hours

[#4]

Peter - that wasn't the problem - you referred to a side note about the difficulty of Googling about it

[#5]

FF does have an option to clear private data when it is shut down (Tools - Options - Privacy), which might explain losing the logins. I would concur with a reinstall.

[#6]

Sorry didn't look at the date d'uh 

[#7]

Hi
I've blocked the adtech site and had a play around, and it seems ok now.
Thanks for the help
John