Hi Sue.
Let's see if we can get some clues as to what's been happening and hopefully get a handle on the cause.
Minidumps are stored in a hidden folder within the main Windows directory: C:\Windows\Minidump where the minidumps have a .dmp file extension (though by default, extensions, and this folder, are hidden).
Show hidden files and folders.
Once you can see the dumps, copy them to a
new folder on your Desktop, zip the contents of that folder (right-click > Send to > Compressed folders) and attach the resulting compressed/zipped file to a Reply.
We'll need some background info + error messages etc. as well: Start > Run >
MSInfo32 > Enter. This should start the collection process for the System Information viewer, it's likely to take several minutes, maybe longer - to check that the info is fully loaded, work through the subsections and check they (almost, a few won't have data) all contain code/details. The main section I'm interested in is the final one, Software Environment > Windows Error Reporting (WER), though many of the others will provide useful info too.
When you're happy that the viewer is fully populated, File > Save > MSInfo32.NFO (the default) to your Desktop, zip it as above and attach the zip file to your Reply.