Depends on your budget and usage.
If no/low budget and happy with speed of current computer - replace network card or get an USB network card to resolve no wifi signal issue.
If no problem with budget - get a brand new latest computer.
Remember, it’s your data in the computer that worth a lot,computer hardware doesn’t cost that much and can be easily replaced.
Answer:
The attributed reason for the discrepancy is that Conversion tracking is generating duplicate conversions.
