Outlook 2010 problems in Win 11

Just to be candid, I'm here at the suggestion of "antspants" over on Eleven Forums. He accepts full responxiblility for my posting this here.

About two weeks ago, I replaced my Win 10 HP laptop with a Win 11 Lenovo SlimPad 5. Got it set up and running great, including installing Office 2010. The first few days were flawless, but Outlook suddenly stopped allowing me to create a new email, and to reply to a received email.

I've tried numerous fixes suggested by Eleven Forums users, but none have panned out.

Currently, attempts to create a new email produce the following popup -


Attempts to reply to an email result in this -


I've tried repairing both Outlook and the Office installation, without success. I've also compared all the Outlook settings in this Lenovo (System 2) with my main PC (System 1) and my now retired HP laptop. They all appear to be the same configuration.

Before I resort to deleting all email accounts in my settings, as well as all related .pst and .ost files, does anyone know of a quick fix for this issue?

Thanks in advance.

Try3 said:

1 What is shown in
Control panel, [use View by - Large/Small icons], Mail (32 bit), Datafiles
also shown in
Outlook, Tools, Account settings, Datafiles tab

2 What is shown in
Control panel, [use View by - Large/Small icons], Mail (32 bit), EMail accounts
also shown in
Outlook, Tools, Account settings, EMail tab

3 What is shown in
Control panel, [use View by - Large/Small icons], Mail (32 bit), Show profiles

4 And do they all match?


All the best,
Denis

Thanks for your reply. Before I address that, I have one update to share. As a result of aimless dinking around with this, I finally was able to get beyond the error messages shown in my original post. Both the "New Email" and "Reply " buttons now lead to the appropriate screens. But, attempts to "Send" either of those emails result in - "Task 'myname@xxxxxxxx - Sending' reported error (0x8004010F) : 'Outlook data file cannot be accessed.'"

I'm not sure I understand your question. If you're asking if the Datafiles, Email Acounts and Profile tabs all show the same information, the answer is no. Datafiles contains two .pst files, one of which is designated as default. Both file names are my correct email address. The non-default file name uses suffix (2). Email Accounts shows only the email address I use with my third-party email host. The Profile tab shows only "Outlook," and no other choices are available.

As a bit of added info, my local Users / xxxx/app data/local/Microsoft/Outlook folder contains three .pst files, one .ost file and one .obi file. PST instance one is 1.3 millionKB, two is 49,000KB and three is 265KB.

- - - Updated - - -

BTW, my Outlook version is part of my Office 2010 Pro Plus SP1 suite. I have the 32-bit version installed. That may, or may not, be relevant.