Hello.Recently my pc started shutting down for no apparent reason. It became more often and to the point i couldnt use it anymore. I reinstalled windows and it worked for a couple of days and then again the random shutdowns. In the event viewer it only says kernel power 41 critical but there are hundreds of so called "solutions" and ive tried alot and none worked. I sent my pc to a tech market and they tested it,cleaned it and said it should work fine and there are no hardware issues.It worked for a week and today it started shutting down again. The dude from the tech market told me it might be the temperatures in the pc bcz i havent changed the termal paste for about 2 years. So i installed PC wizard and some stressing software and seen that at idle,in the OS doing nothing my cpu core is at about 44degrees celsius and when i stress it to 100% it goes to about 64.5 degrees. The CPUTIN is then 69.5. Is this too high? Should the idle temp be lower than 44? Should i buy some thermal paste?