after scanning computer mobile tethering won't work

hello. i have recently figured a way to make mobile tethering work on my windows xp and have been using it for a while. having access to the internet, i wanted to secure my pc from viruses. i installed AVAST and when i did it offered me a scan. i thought it can’t harm to scan my computer right? i went for it and after my computer has started up, as usual, i switched my mobile tethering on. i noticed my skype wasn’t connecting and figured it might just be a lag but when i opened the browser i had what to see. my tethering wasn’t working anymore, tho it said my PC was connected to the internet. i tried reinstalling my tethering software various times but nothing worked.
does anyone have an idea what went wrong and how i might be able to fix this issue?
thank you in advance!

Did avast detect and remove anything during the scan?
If so, what was detected/removed … check avast chest (quarantine)

What exact version of avast ?

i uninstalled AVAST shortly after finding out my tethering is bugged hoping somethin would change so i don’t know is the chest folder still somewhere on my computer.

and it was version 10.2.2215.880

Have you tried the new “release candidate”?

https://forum.avast.com/index.php?topic=172334.msg1223495#msg1223495

i haven’t. but will i be able to install without internet connection on my computer?