Hi, i hope this is the right place to post this.
Last night (UK Time) i logged in and Avast Anti Virus needed to update, i updated and since then my speed has been like a snail.
Speed test at https://fast.com/ has 1.8MB (on this pc)
Just checked laptop and speed is 11MB.
I've scanned with Malwarebytes and Microsoft scan from here (https://www.microsoft.com/security/scanner/en-us/default.aspx) both clean.
This PC is Vista, i use Firefox and have Avast antivirus and COMODO Firewall
Thanks for any help