Here is the report for the first one on your list:

https://crash-stats.mozilla.org/report/index/f0136ccf-a9b3-4f6e-85b4-1393e0210218

Try running Windows in safe mode to see if Bitdefender or the NVIDIA driver are possible causes. Since it happens when deleting, Bitdefender is a likely source, especially if it's set to scan the TB profile folder.

I checked Bitdefender and my seetings are off for checking Spam (see image)

It's not the Spam settings that are important, but rather the TB profile folder must be added as an exception:

https://www.bitdefender.com/consumer/support/answer/13427/

See also https://support.mozilla.org/en-US/questions/1275164#answer-1276081

monmarshall,

Do you have more crash reports?

yes, how can i send you the latest (this morning) ?

From the the troubleshooting information page, use mouse to copy the text, and paste it here in this topic. Please do not use screen shot. Thanks

from your PM, your latest crash is https://bugzilla.mozilla.org/show_bug.cgi?id=646168 for which there is currently not a solution.

ID: bp-a69ebc29-6ccd-44f6-b987-686c50210324 Signature: nsMsgXFViewThread::RemoveChildHdr

DetailsCrash AnnotationsBugzillaModulesRaw Data and MinidumpsExtensionsTelemetry EnvironmentCorrelations

Signature nsMsgXFViewThread::RemoveChildHdr More Reports Search

UUID a69ebc29-6ccd-44f6-b987-686c50210324 Date Processed 2021-03-24 00:34:53 UTC Uptime 1,584 seconds (26 minutes and 24 seconds) Last Crash 140,311 seconds before submission (1 day, 14 hours and 58 minutes) Install Age 1,017,526 seconds since version was first installed (1 week, 4 days and 18 hours) Install Time 2021-03-12 05:55:28 Product Thunderbird Release Channel release Version 78.8.1 Build ID 20210304234616 (2021-03-04) Buildhub data OS Windows 7 OS Version 6.1.7601 Service Pack 1 Build Architecture x86 CPU Info GenuineIntel family 6 model 37 stepping 2 CPU Count 4 Adapter Vendor ID NVIDIA Corporation (0x10de) Adapter Device ID G92 [GeForce 9800 GTX / 9800 GTX+] (0x0612) Startup Crash False Crash Reason EXCEPTION_ACCESS_VIOLATION_READ Crash Address 0x6f727583 Accessibility Active EMCheckCompatibility False Collector Notes Removed Email from raw crash. App Notes FP(D00-L1000-W00001000-T000) D2D1.1? DWrite? DWrite+ D2D1.1+ WR? WR- OMTP? OMTP+3 Processor Notes processor_ip-172-31-9-72_us-west-2_compute_internal_7; ProcessorPipeline Crashing Thread (0) Frame Module Signature Source Trust 0 xul.dll nsMsgXFViewThread::RemoveChildHdr(nsIMsgDBHdr*, nsIDBChangeAnnouncer*) comm/mailnews/base/src/nsMsgXFViewThread.cpp:291 context 1 xul.dll nsMsgSearchDBView::OnHdrDeleted(nsIMsgDBHdr*, unsigned int, int, nsIDBChangeListener*) comm/mailnews/base/src/nsMsgSearchDBView.cpp:207 cfi 2 xul.dll nsMsgDatabase::NotifyHdrDeletedAll(nsIMsgDBHdr*, unsigned int, int, nsIDBChangeListener*) comm/mailnews/db/msgdb/src/nsMsgDatabase.cpp:805 cfi 3 xul.dll nsMsgDatabase::DeleteHeader(nsIMsgDBHdr*, nsIDBChangeListener*, bool, bool) comm/mailnews/db/msgdb/src/nsMsgDatabase.cpp:1833 cfi 4 xul.dll nsMsgLocalMailFolder::DeleteMessages(nsIArray*, nsIMsgWindow*, bool, bool, nsIMsgCopyServiceListener*, bool) comm/mailnews/local/src/nsLocalMailFolder.cpp:1041 cfi 5 xul.dll nsMsgLocalMailFolder::EndMove(bool) comm/mailnews/local/src/nsLocalMailFolder.cpp:2411 cfi 6 xul.dll nsCopyMessageStreamListener::EndCopy(nsISupports*, nsresult) comm/mailnews/base/src/nsCopyMessageStreamListener.cpp:125 cfi 7 xul.dll nsCopyMessageStreamListener::OnStopRequest(nsIRequest*, nsresult) comm/mailnews/base/src/nsCopyMessageStreamListener.cpp:145 cfi 8 xul.dll nsMsgProtocol::OnStopRequest(nsIRequest*, nsresult) comm/mailnews/base/src/nsMsgProtocol.cpp:386 cfi 9 xul.dll nsMailboxProtocol::OnStopRequest(nsIRequest*, nsresult) comm/mailnews/local/src/nsMailboxProtocol.cpp:384 cfi 10 xul.dll nsInputStreamPump::OnStateStop() netwerk/base/nsInputStreamPump.cpp:649 cfi 11 xul.dll nsInputStreamPump::OnInputStreamReady(nsIAsyncInputStream*) netwerk/base/nsInputStreamPump.cpp:397 cfi 12 xul.dll mozilla::SlicedInputStream::OnInputStreamReady(nsIAsyncInputStream*) xpcom/io/SlicedInputStream.cpp:416 cfi 13 xul.dll nsInputStreamReadyEvent::Run() xpcom/io/nsStreamUtils.cpp:94 cfi 14 xul.dll nsThread::ProcessNextEvent(bool, bool*) xpcom/threads/nsThread.cpp:1211 cfi 15 xul.dll NS_ProcessNextEvent(nsIThread*, bool) xpcom/threads/nsThreadUtils.cpp:501 cfi 16 xul.dll mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) ipc/glue/MessagePump.cpp:87 cfi 17 xul.dll MessageLoop::RunHandler() ipc/chromium/src/base/message_loop.cc:308 cfi 18 xul.dll MessageLoop::Run() ipc/chromium/src/base/message_loop.cc:290 cfi 19 xul.dll nsBaseAppShell::Run() widget/nsBaseAppShell.cpp:137 cfi 20 xul.dll nsAppShell::Run() widget/windows/nsAppShell.cpp:430 cfi 21 xul.dll nsAppStartup::Run() toolkit/components/startup/nsAppStartup.cpp:271 cfi 22 xul.dll XREMain::XRE_mainRun() toolkit/xre/nsAppRunner.cpp:4665 cfi 23 xul.dll XREMain::XRE_main(int, char**, mozilla::BootstrapConfig const&) toolkit/xre/nsAppRunner.cpp:4812 cfi 24 xul.dll XRE_main(int, char**, mozilla::BootstrapConfig const&) toolkit/xre/nsAppRunner.cpp:4866 cfi 25 xul.dll mozilla::BootstrapImpl::XRE_main(int, char**, mozilla::BootstrapConfig const&) toolkit/xre/Bootstrap.cpp:45 cfi 26 thunderbird.exe NS_internal_main(int, char**, char**) comm/mail/app/nsMailApp.cpp:324 cfi 27 thunderbird.exe wmain(int, wchar_t**) toolkit/xre/nsWindowsWMain.cpp:131 cfi 28 thunderbird.exe __scrt_common_main_seh() /builds/worker/workspace/obj-build/comm/mail/app/f:/dd/vctools/crt/vcstartup/src/startup/exe_common.inl:288 cfi 29 kernel32.dll BaseThreadInitThunk cfi 30 ntdll.dll __RtlUserThreadStart cfi 31 ntdll.dll _RtlUserThreadStart

Since your last crash is unrelated to your earlier crashes, perhaps those are gone.