Some extra issues,
(1) the block time of this coin
(2) too many orphans with some ratio between PoW/PoS diffs
(3) threading for PoS mining (and/or better PoS mining)
(4) block time reference in the three
1) doubling the block time would not solve the problem. Significantly larger increase would completely change the characteristics of the coin.
3) What means better PoS mining? What could be done better there? I don't think that running several PoS threads would increase your income from PoS mining.
4) What you mean?
1) My means, what is the official (or target/designed) block time for this coin ?
it is 30s (official) or 20s (practical)
I guess, it should be defined
The target spacing is 30 seconds for both PoW and Pos. I need to check how it interacts exactly to give you more detailed answr.
3) thread is for the release CPU power for the other application also, at least, it will hold CPU for 15ms, and give a chance to run the other threads,
actually, there is no need to increase the PoS mining speed or performance whatever, actually, it is the function of diff of PoS.
I believe that this is not a wallet problem, but Windows GUI app and AV related.
Here is the per-thread stats of grain wallet with quite a number of the inputs eligible for PoS mining that is running under Linux on 2GHz double core AMD Athlon(tm) II X2 270:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
28314 grain 39 19 1050048 162004 4032 S 10.2 0.5 93:53.15 bitcoin-miner
28304 grain 20 0 1050048 162004 4032 S 0.3 0.5 0:21.93 bitcoin-wallet
28311 grain 20 0 1050048 162004 4032 S 0.3 0.5 0:02.75 bitcoin-opencon
26919 grain 20 0 1050048 162004 4032 S 0.0 0.5 1:52.97 graind
28308 grain 20 0 1050048 162004 4032 S 0.0 0.5 0:01.01 bitcoin-ircseed
28313 grain 20 0 1050048 162004 4032 S 0.0 0.5 0:03.54 bitcoin-adrdump
. You may see that the PoS miner thread consumes 10.2 % of the CPU time.
Could you try to run gui-less variant of wallet (graind) as a daemon and see if that makes sense?