M MrToad Member Joined Apr 30, 2014 Posts 7 Apr 30, 2014 #1 System: Win7 Home Premium sp1 all updated, IE 10 updated. Private firewall, Security essentials...reverted from Avast which probably started the problems. Malware free: Complete scans by Malwarebytes, Superantispyware & security essentials. IE problem: IE11 would start, hang for 2-4 seconds, then close. Cleaned cash removed add-ons No help Same response. ...reverted to IE1O from 11 by deleting update, Updated IE 10 with windows update...No help does the same. I've run microsoft fixits to fix and reset to default..no help. Uninstalled IE10..udated IE9 does the same starts, hangs 5-30 seconds, then closes. Connection problem: Can't connect to internet with other browsers - Firefox, " "server not found" Chrome "DNS_PROBE_FINISHED_NO_INTERNET" and new install Opera. 'Webpage not available' Thunderbird email client also can't connect. Suspecting a DNS problem, I applied Microsoft fixit 50199 to reset TCP/IP, switched to OpenDNS...neither helped, still same error messages. I tried to access google with IP 188.8.131.52 instead of name...no help...seems to rule out DNS problem I did a brand new install on Opera with no addons or history...same problem...seems to rule out rogue addons or bad history with Firefox and chrome, my primary browsers...I only use IE occasionally. Network OK: 3 other PC's connect with no problems and I can access files on the problem computer across the network. I can update security essentials, use windows update and update superantispyware. When I ping google.com Google from cmd, I get good results...no problem. Although I can trasfer files across the network, Vice-versa [cross-network file updater] starts with"cannot initialize windows sockets" on the problem PC, but I can use the same program on another pc to update files on the problem pc. I've tried all the available restore points, with no results. I have a backup from 3/30, but I'm not sure if it's a system backup...Created with win7 backup. I have quest network tools program, a network diagnostic toolbox with capabilities I don't understand...but that might be of use to an expert here offering diagnostic suggestions. Other stuff I've tried: windows, "Diagnose connection problems" Disabled Firewall. Safe mode with networking...None helped the problem. To summarize: Win7 PC updated, malware free, can't connect to internet with multiple browsers, DNS problem ruled out...but can ping google & update some software. IE crashes on startup. Error message "cannot initialize windows sockets" Insights and suggestions needed and appreciated. Perplexed MrToad.