So today i decided to clean my pc from dust with a paint brush, after that i had problem with adding the cpu cooler, after some time i figured it out, when i had problems installing the cooler it shut it self down after a few seconds, when i managed to fix it my pc was very slow, what can be the problem? It took about 5-7 mins to load google chrome, or other programs (I dont know much about pc,i know the very basic stuff) could it be that i need to replace the thermo paste?