That file found by TDSSKiller is legit (sptd.sys)
Did you remove, what AVG found?
But, I took another look at Process Explorer log and I saw something, what I didn't see before.
Sometimes, you need a fresh look, I guess.
Some SolutoService.exe process from Soluto Anti-Frustration Software is using 50 % of your CPU.
I have no idea what it is, but please, uninstall it, restart computer and post fresh PE log.