I've did not uninstalled Avast before installing other antiviral products, I've only disabled it's autorun and services. But drivers of Avast firewall were still loading, and they caused system hangs and sometimes BSODs. When I've understood this I've removed all Avast drivers and devices associated with them. But after this Windows began find drivers for unknown devices after startup. Wi-Fi did not work, so I've reinstalled drivers for it. I've uninstalled Avast, but virtual firewall's miniport still leaves. Internet works, but it's very slow, Windows sometimes hangs, and my dock widgets has no access to the size of incoming/outcoming traffic. In the list of network adapters of these widgets is only Avast's miniport, other are unavailable. But neither Everest nor Windows'es network adapters list does not show such device. I've reinstalled and uninstalled Avast again but this did not helped. Is there any solution besides reinstalling Windows?