I need a program that can monitor my system temps.

[panzerfaust]

16. No bent CPU pin - else it would not run (that has been my sad experience)

What I would do (I built my first PC in 1982, my last in 2011, getting ready to build my next now):

Open the case:
Unplug every single connector and board.
Blow out all the connections with compressed air.
Vac all the fans and filters (vac not good on MB - can suck off components).
Make sure the fans are really running!
Reassemble.

No Joy?
Well, you did mess with the CPU so ...
Pull the CPU
Remove ALL of your new heatpaste (99% Isoprop Alcohol works fine)
Put ONLY a SMALL DOT of heatpaste on the CPU.
Reassemble.

Still no Joy?
Try running with the minimal amount of RAM the sys will boot with,
only the boot hard-drive connected,
and ALL add-in cards removed.

Yet still no Joy?
Think power supply.

Simply swap it out with a good one,
OR buy a PS tester (which one should have anyhow)
I use a PS tester called "Ultra" which I bought on Amazon for 15 bucks several years ago (and which has saved me many hours and $$$ since then. There are several for about that price range (search 'Electronics' power supply tester computer)

If that all fails, then try temporarily replacing the boot drive with another one - preferably one running with a different OS (LINUX is free) which - if that works - points to the need to, once again, reinstall windows, or to replace the HD.

If none of this has worked - likely the MB is Mort - though one could try wiping the CMOS, and then, if still inop, replacing the BIOS before tossing the MB.