Hi everyone My installation of Thunderbird on a Windows 10 laptop has often been quite slow, but now it's not opening at all. After around 10 minutes of inactivity I get the following error. Could anyone please help? Many thanks Jon BlockedDllList: BreakpadReserveAddress: 53608448 BreakpadReserveSize: 83886080 BuildID: 20201211152611 CPUMicrocodeVersion: 0xa0b CrashTime: 1608990662 FramePoisonBase: 0000004041080832 FramePoisonSize: 65536 InstallTime: 1608829407 ModuleSignatureInfo: {"Apple Inc.":["mdnsNSP.dll"],"Avast Software s.r.o.":["aswhook.dll"],"Microsoft Corporation":["D3DCOMPILER_47.dll","api-ms-win-crt-multibyte-l1-1-0.dll","api-ms-win-crt-environment-l1-1-0.dll","api-ms-win-crt-utility-l1-1-0.dll","api-ms-win-crt-time-l1-1-0.dll","api-ms-win-crt-filesystem-l1-1-0.dll","api-ms-win-crt-locale-l1-1-0.dll","api-ms-win-crt-math-l1-1-0.dll","api-ms-win-crt-stdio-l1-1-0.dll","api-ms-win-crt-convert-l1-1-0.dll","api-ms-win-crt-string-l1-1-0.dll","api-ms-win-crt-heap-l1-1-0.dll","api-ms-win-core-file-l2-1-0.dll","api-ms-win-core-synch-l1-2-0.dll","api-ms-win-core-file-l1-2-0.dll","api-ms-win-core-timezone-l1-1-0.dll","ucrtbase.dll","msvcp140.dll","api-ms-win-core-processthreads-l1-1-1.dll","api-ms-win-core-localization-l1-2-0.dll","VCRUNTIME140.dll","api-ms-win-crt-runtime-l1-1-0.dll"],"Microsoft Windows":["d3d11.dll","dxgi.dll","DWrite.dll","powrprof.dll","dnsapi.dll","wbemcomn.dll","wbemprox.dll","avrt.dll","npmproxy.dll","nlaapi.dll","netprofm.dll","uxtheme.dll","RpcRtRemote.dll","rsaenh.dll","dwmapi.dll","ntmarta.dll","winmm.dll","cryptsp.dll","wsock32.dll","WSHTCPIP.DLL","mswsock.dll","dhcpcsvc6.DLL","dhcpcsvc.dll","dbghelp.dll","version.dll","wtsapi32.dll","winnsi.dll","IPHLPAPI.DLL","wshbth.dll","winrnr.dll","pnrpnsp.dll","NapiNSP.dll","CRYPTBASE.dll","sspicli.dll","shlwapi.dll","clbcatq.dll","profapi.dll","cfgmgr32.dll","rpcrt4.dll","msctf.dll","psapi.dll","lpk.dll","KERNELBASE.dll","user32.dll","setupapi.dll","usp10.dll","devobj.dll","ws2_32.dll","ole32.dll","gdi32.dll","oleaut32.dll","crypt32.dll","advapi32.dll","msvcrt.dll","shell32.dll","sechost.dll","kernel32.dll","msasn1.dll","imm32.dll","wintrust.dll","userenv.dll","nsi.dll","Wldap32.dll","ntdll.dll"],"Mozilla Corporation":["thunderbird.exe","xul.dll","nss3.dll","ldap60.dll","lgpllibs.dll","prldap60.dll","mozglue.dll"]} MozCrashReason: Failed to get async shutdown service: NS_ERROR_FILE_NOT_FOUND ProductID: {3550f703-e582-4d05-9a08-453d09bdfdc6} ProductName: Thunderbird ReleaseChannel: release SafeMode: 0 SecondsSinceLastCrash: 674 StartupCrash: 1 StartupTime: 1608990599 ThreadIdNameMapping: 1564:"Gecko_IOThread",4640:"Link Monitor #1",3976:"Socket Thread",2168:"Permission",5516:"Timer",5568:"BackgroundThreadPool #1",5624:"JS Watchdog",5608:"JS Helper",5604:"JS Helper",1476:"BGReadURLs",5592:"Cache2 I/O",5660:"Cookie",5628:"Worker Launcher", Throttleable: 1 URL: UptimeTS: 147.197196 Version: 78.6.0 This report also contains technical information about the state of the application when it crashed.