It's an old wallet.dat I had, and I used Bitcoin core. The option for abandon transaction and "increase transaction fee" are both greyed out. Windows 10 OS x64. I don't know what the pruned wallet is. Sorry, I just got back into this space. I downlaoded the bitcoin core, synced it, and imported an old wallet and sent the funds with a too small fee. That's all i know.
Alright. Assuming that you didn't have a pruned wallet and the client (I assume 64bits) is installed inside the program files.
Press the Window Key and R simultaneously. Type CMD and press enter. Paste the following:
"C:\Program Files\Bitcoin\bitcoin-qt.exe" -zapwallettxes
This will get rid of every transaction and display only the confirmed transactions.