My husband did some BTC mining in 2010 back and had a wallet on a computer that went bad.   He took the hard drive out to save it and later thought maybe he could find some.

We recently moved and found the hard drive of this computer that had the wallet on it.  When we accessed the wallet we found a few bitcoin and decided we needed to secure it asap with all that is going on with bitcoin these days. We made multiple copies and ordered a nanoledger...which is yet to arrive.

In the meantime, my husband sends a couple bucks worth of BTC to a friend to ensure the wallet is accurate.   It worked. Friday he buys a tiny bit of bitcoin and receives it to his wallet on the desktop at office.  At this time the amount on the wallet is still the same. (His office computer ledger is up to date).

He then gives me the backup of the wallet and has me download bitcoin core-qt to my computer so that we can monitor it at home vs in his self-employed office.  I start downloading the blockchain last week.  Super slow of course.  I load up the wallet in the meantime. It shows the same amount as my husband's computer had shown. Friday night my computer finishes syncing the core program up and it shows a *2 transactions* from the day before with all of our BTC being transferred out. Neither of us did this and no one else had access to the computer. We have done malware scans with no results. Teamviewer was on my computer and on his, but not open. When we follow the trail to see where the BTC went it is just sitting in a wallet with no other crypto but our amount. I would think if it were hackers they would have split it off by now and moved it elsewhere.

Also, there was no password, I guess, on the wallet at my house...didn't think about that.  My husband's work computer had a password.  Written down.  It doesn't show the change, but he can't access it now because the password doesn't work.

Antivirus:
- windows defender
- malwarebytes on office computer and home lapton ran and showed nothing
- mcafee

Is there a chance it is a corrupted wallet vs a hack? Is there anyway for us to get it? Help please. (A sleep deprived mom and wife trying to help out).:-)