Can't connect to legit sites

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Since last update I can't connect to legit sites. With web-shield off it is possible to work some work, but not to sign in to avast forum!! You ask me how could I post this message? I've used another fully unprotected Xubuntu comp.
Avast: 2015.10.2.2215  OS: Windows XP SP3 Browser: PaleMoon

[Pondus]

do you use a firewall other then windows?

if so, try this ... delete all avast rules in firewall, reboot and create new rules when firewall ask

[Asyn]

- Which Avast..? (Free/Pro/IS/Premier)
- Other security related software installed..?
- Which AV(s) did you use before Avast..?

[REDACTED]

I'm using Avast free for 4+ years, Windows firewall is disabled, Avast firewall is off. The issue showed up after reinstalling Avast yesterday. I've noticed that after disabling/enabling web-shield thrice connections work OK

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Cont: No other security software installed before

[Asyn]

1. Download Avast Free Antivirus: https://files.avast.com/iavs9x/avast_free_antivirus_setup.exe
2. Follow instructions: https://www.avast.com/uninstall-utility (Run this tool for all prior installed Avast versions..!!)
3. Reinstall Avast with the downloaded installer from point 1.
4. Reboot.

[REDACTED]

Clean install helped. Also disable reputation services.
Thanks for  all your helpful advises.

[Asyn]

You're welcome.