Windows 10: Import recovered OST into Outlook 2010?

I manually mined the files from my crashed laptop before I reinstalled Windows 10 and Office 2010.

I lost all my contacts - it is an Outlook.com account but the contacts were not synched with the web version.

I believe I got the correct OST file from the savage operation.

Is there anyway I can import that into my current Outlook (ideally without scrapping the emails I sent and received in the past two weeks since I reimaged the pc)?

Thanks!

:)

 

Changing the File Type on an Outlook *.OST file.

I did a stupid thing and inadvertently changed the file type of an Outlook 2016 OST file to a PDF file. I have tried to change the type of file that *.OST is used by to Outlook but Windows 10 does not let me. Does anyone have any suggestions.

Thanks

 

Backing Up Outlook?

How to move your personal folders (.pst) file in Outlook
Microsoft Office Outlook 2010 Backup
Office Outlook 2010 Import And Export
Export/Import Ribbon & Quick Access Toolbar Settings [Office 2010]
Export Outlook 2010 Mail, Contacts, Notes, Tasks, and Appointments
Outlook Data Export 2.0 Previews of new add-in versions & features
Outlook Data Export Version 2.0.0.1 beta 1
Move Outlook information to another computer that has Outlook 2010 installed
Where does Microsoft Outlook 2010 save my information and configurations?
And, here > Search results

 

Outlook 2010 Data file import error to Outlook 2013


My employer (School Board) requested all staff laptops be returned over summer so the OS could be upgraded from Win 7 Enterprise, so I did an export of my Outlook 2010 file to work on from home- they now want all Outlook profiles below 50 MB. My personal laptop (Win 7 Pro with Office 2010) died last Tuesday before I could import said file. New ASUS G771J laptop came with Win 8.1 Home which I upgraded yesterday to Win 10 Home. Employer is moving to Office 2013 so I installed the HUP version yesterday as well.
Am now trying to import a password protected Outlook 2010 file (backup.pst) that was backed up from the work Acer running Win 7 Enterprise computer and Office 2010. I use Thunderbird or Gmail as my email client so will not use Outlook 2013 beyond weeding through this mound of work emails.
Was on M$ Win 10 website
Import Outlook items from an Outlook Data File (.pst)
but get either "This Outlook data file (.pst) is already in use in the current profile" when using the export function or "We didn't find anything to show here" when I use the Open Data File (.pst) command from "Open & Export" from the File tab and point to the backup file from work.
Both backup files are named differently depending on the Outlook version 2010 (backup.pst) and 2013 (Outlook.pst) so I copy/pasted the 2010 file into the same folder as the 2013 file then renamed the 2013 file to Outlook.OLD hoping that would trigger Outlook to accept the 2010 file but Outlook wouldn't open saying it was missing the outlook file.
Made a new profile to load the 2010 .pst into but Outlook again said there was nothing to see.
I don't have access to the full Office 2010 program as our employee only gives a link to the install EXE which is now not available as they move to Office 2013, so I can't replace 2013 with 2010.
Checked the password (employer says mandatory) I used when making the backup at work and it is correct - entered it both on my iPhone and on Password Corral when I got home.
Could the problem lie with an export file done from Outlook 2010 on Win 7 Enterprise and then importing to Outlook 2013 on Win 10 ?
While I can work through most problems with Win 10 this has me stumped. Passed it on to my IT trained son who also has run out of suggestions.
Any help would be appreciated.